From cb38f4059e444463dd7db1a4e4d55258b0355e84 Mon Sep 17 00:00:00 2001
From: Ayushi <46610680+Ayushi141@users.noreply.github.com>
Date: Fri, 11 Oct 2024 11:06:41 +0200
Subject: [PATCH] Initial Overleaf Import

---
 main.tex          |  149 ++++
 preamble.tex      |  225 +++++
 tufte-book.cls    |   80 ++
 tufte-common.def  | 2025 +++++++++++++++++++++++++++++++++++++++++++++
 tufte-handout.cls |   39 +
 5 files changed, 2518 insertions(+)
 create mode 100644 main.tex
 create mode 100644 preamble.tex
 create mode 100644 tufte-book.cls
 create mode 100644 tufte-common.def
 create mode 100644 tufte-handout.cls

diff --git a/main.tex b/main.tex
new file mode 100644
index 0000000..71b2998
--- /dev/null
+++ b/main.tex
@@ -0,0 +1,149 @@
+\input{preamble.tex}
+\title{Galois Cohomology of Algebraic Groups}
+\author[Ayushi Tsydendorzhiev]{Ayushi Tsydendorzhiev}
+\usepackage{enumitem}
+\usepackage{stmaryrd}
+\usepackage{xhfill}
+\usepackage{array}
+\usepackage{outlines}
+\usepackage{faktor}
+\usepackage{float}
+\usepackage{mathtools}
+\usepackage{tikz-cd}
+\usepackage{centernot}
+\usepackage{cancel}
+\newcommand{\ra}{\rightarrow}
+\newcommand{\lra}{\longrightarrow}
+\newcommand{\eps}{\varepsilon}
+\renewcommand{\P}{\mathbb{P}}
+\newcommand{\acts}{\curvearrowright}
+\newcommand\Gal[1]{\operatorname{Gal}({#1})}
+\renewcommand{\phi}{\varphi}
+
+\begin{document}
+
+\maketitle
+
+\tableofcontents
+\clearpage
+
+\section{Introduction}
+
+\subsection{Galois group actions}
+\marginnote{Lecture 1, 10.10.2024}
+\begin{outline}
+\0 Let $L/K$ be a Galois extension and $G=\Gal{L/K}$ its Galois group. The Galois group $G$ acts on $L$ via field automorphisms:
+    \1 Action on the field extension $L$: For $\Q(\sqrt{2})$ its Galois group $\Gal{\Q(\sqrt{2})/\Q}$ acts either by identity or by sending $\sqrt{2}$ to $-\sqrt{2}$.
+    \1 Action on the dual of the field extension $L^*$: For $\Q(\sqrt{2})^*$ its Galois group acts on $f(x_1,x_2)=x_1\cdot 1 + x_2 \cdot \sqrt{2}$ either by identity or by sending $f$ to $f'=x_1\cdot 1 -x_2 \cdot \sqrt{2}$.
+    \1 Action on the group of $n$th roots of unity $\mu_n(L)$: 
+        \2 In $\Q(\sqrt{2})$, the $n$th roots of unity consist of $\{-1,1\}$ if $n$ is even and $\{1\}$ if $n$ is odd. Both automorphisms in $\Gal{\Q(\sqrt{2})/\Q}$ leave $\mu_n(\Q)$ fixed, so this tells us that they all belong to the base field (are rational, in this case). 
+        \2 A more interesting example is the $n$th cyclotomic field $\Q(\zeta_n)$.In this field $\mu_n (Q(\zeta_n))=\langle \zeta_n \rangle$, the cyclic group generated by $\zeta_n$. The Galois group $\Gal{Q(\zeta_n)/Q}$ is isomorphic to $(\Z/n\Z)^*$. For $n=5$ (prime), the Galois group is cyclic and consists of $\{1, \zeta_5, \zeta_5^2, \zeta_5^3, \zeta_5^4\}$. The action of the Galois group then permutes the $5$th roots of unity. For $n=8$, the Galois group $\Gal{\Q(\zeta_8)/\Q}$ is isomorphic to $(\Z/8\Z)^*=\{1,3,5,7\}$ and is cyclic of order $4$. The basis of $\Q(\zeta_8)$ over $\Q$ is given by $\{1,\zeta_8,\zeta_8^2, \zeta_8^3\}$. The actions is given as: $\sigma_1$ acts trivially, $\sigma_3$ maps $\zeta_8$ to $\zeta_8^3$, $\sigma_5$ acts by multiplication by $-1$ and $\sigma_7$ maps $\zeta_8$ to $\zeta^7_8$.
+    \1 Action on the cyclic group $(\Z/n\Z)^*$: same as above.
+    \1 Action on a finite abelian group $M$: trivial action.
+    \1 Action on the general linear group $\GL_n(L)$ over a field $L$ of characteristic $0$: $\GL_n(L)$ consists of $n\times n$ invertible matrices over $L$. We have a Galois extension $L/K$. The Galois group acts by applying the field automorphisms to the entries of the matrices, so $\sigma(A)=\sigma(a_{ij}) \forall 1\leq ij \leq n$. The fixed points contain $\GL_n(K)$.
+        \2 Backstory: The determinant of a $n\times n$ matrix $A$ is defined as 
+        \marginnote{$\sgn(\pi)$ is either even or odd. $+1$ if even and $-1$ if odd.}
+        $$\det(A) = \sum_{\pi \in S_n} \left( \sgn(\pi) \prod_{i=1}^n a_{i,\pi(i)} \right)$$
+        Consider $\sigma(\det (A))$, where $\sigma \in \Gal{L/K}$ is a field automorphism. It distributes over addition and multiplication:
+        $$\sigma(\det(A)) = \sum_{\pi \in S_n} \left( \sgn(\pi) \prod_{i=1}^n \sigma(a_{i,\pi(i)}) \right)$$
+        The signum is either $+1$ or $-1$, so it is always in the base field $K$ and is fixed by $\sigma$. Thus $\sigma(\det(A))=\det(\sigma(A))$. So the action of the Galois group preserves determinants.
+\end{outline}
+
+\subsection{The fixed point functor and exact sequences}
+
+\begin{outline}
+\0 All of these examples are special cases of a more general concept: a group $G$ acting on an algebraic group $\bG \subseteq \GL_n$.
+\marginnote{An algebraic group is a matrix group defined by polynomial conditions, at least this is what \enquote{The theory of group schemes of
+finite type over a field.} by Milne says. I guess this is the consequence of Chevalley theorem?}
+
+When studying group actions, we're often interested in fixed points 
+$$A^G =\{a\in A \mid \forall \sigma \in G: \sigma a = a \}$$ 
+Here, $A^G$ represents the set of all elements in $A$ that are fixed by every element of $G$. To study fixed points more systematically, we introduce the fixed point functor $-^G$. This functor takes a $\Z G$-module  and returns its fixed points. We're particularly interested in how this functor behaves with respect to exact sequences.
+
+\begin{note}
+~\\
+\textbf{Group action perspective}: A $\Z G$-module is an abelian group $A$ endowed with a (left) action $(\sigma, a) \mapsto \sigma a$ of $G$ on $A$ such that for all $\sigma\in G$ the map $\phi_\sigma : a \mapsto \sigma a$ from $A$ to $A$ is a morphism of abelian groups. This implies that the action of $G$ is distributive, $\phi_\sigma (ab) = \phi_\sigma (a) + \phi_\sigma (b)$.\\
+\textbf{Ring module perspective}: Equivalently, a $\Z G$-module is a module over the group ring $\Z[G]$, where elements consist of formal linear combinations of elements from group $G$ with integer coefficients, so something like $3g_1+4g_2+10g_3 \in \Z[G]$. It contains both $\Z$ and $G$ as subrings.\\
+The $\Z[G]$-module structure encapsulates both the abelian group structure of $A$ and the $G$-action on $A$, which leads to the key insight:
+$$\{\text{module over } \Z[G]\} \leftrightarrow \{\text{abelian group $A$ with $G$-action}\}$$
+\end{note}
+
+\begin{lemma}
+    Consider an exact sequence of $\Z G$-modules:
+    $$\begin{tikzcd}
+    0\arrow[r] & A \arrow[r, "f"] & B\arrow[r, "g"] & C\arrow[r, "h"] & 0
+    \end{tikzcd}$$
+    Applying the fixed point functor $-^G$ to this sequence yields:
+    $$\begin{tikzcd}
+    0\arrow[r] & A^G \arrow[r, "f^G"] & B^G \arrow[r, "g^G"] & C^G
+    \end{tikzcd}$$
+    This new sequence is exact in Ab (the category of abelian groups). Thus the functor $-^G$ is left-exact, meaning it preserves exactness at the left end of the sequence.
+\end{lemma}
+
+    \1 A natural question arises: Is the fixed point functor also right-exact? If such a lifting always exists, then the fixed point functor preserves exactness at $C$, making it right-exact.
+    If not, we've discovered an obstruction that tells us something about the Galois action and the structure of our groups.
+    \1 To investigate this, we need to check if $\ker h^G = \im g^G$, or equivalently, if $\im g^G = C^G$. Breaking this down:
+        \2 Take any $c \in C^G$. 
+        \2 Since $C^G \subseteq C$, there exists a $b \in B$ such that $g(b) = c$.
+        \2 If $b$ were fixed by $G$, we'd be done. But it might not be. 
+        \marginnote{Why $\sigma b = b$?}
+            \3 Consider $\sigma b - b$ for any $\sigma \in G$. We have $g(\sigma b - b) = g(\sigma b) - g(b)= \sigma g(b)-g(b)=\sigma c - c$. 
+            \3 Since $c\in C^G$, $\sigma c - c = 0$ and $(\sigma b-b)\in \ker g$.
+            \3 By exactness, $\ker g = \im f$, so $\sigma b - b \in \im f$.
+            \3 We can view this as an element of $A$ (considering $f$ as an inclusion $A \subseteq B$). 
+    \1[] So the question of right-exactness boils down to whether or not every $G$-invariant element of $C$ can be lifted to a $G$-invariant element of $B$ and the obstruction to it lives inside $A$.
+    \1 This analysis leads us to define a map (for a given $c\in C^G$):
+    $$\phi: G \to A, \quad \sigma \mapsto \sigma b - b =: a_\sigma$$
+    This map is called a crossed homomorphism (also known as a derivation or 1-cocycle). It measures how far $b$ is from being $G$-invariant. If $b$ were $G$-invariant, this map would be identically $0$.
+    
+\begin{proposition}
+    The map $\sigma \mapsto a_\sigma$ satisfies:
+    $$a_{\sigma\tau} = a_\sigma + \sigma a_\tau$$
+    This property is what defines a crossed homomorphism.
+\end{proposition}
+
+    \1 \textbf{In the abelian case}, we define 
+        \2 $Z^1(G,A)=\{a':G\ra A \mid a'_{\sigma \tau} = a'_{\sigma}+\sigma a'_{\tau}\}$, the set of all crossed homomorphisms from $G$ to $A$.
+        \2 $B^1(G,A)=\{a:\sigma \in Z^1(G,A) \mid \exists a'\in A : a_\sigma = \sigma a' - a'\}$. 
+        \2 The quotient $H^1(G,A) = Z^1(G,A) / B^1(G,A)$ is called the \textbf{first cohomology group} of $G$ with coefficients in $A$. It measures the obstruction to the right-exactness of the fixed point functor.
+        \marginnote{The functor $A\mapsto H^1(G,A)$ is a derived functor of the $A\mapsto A^G$ functor.}
+    
+    \1[] The obstructions for right-exactness: find $\sigma b -b \in A$ such that it is $0$ under projection in $Z^1(G,A)/B^1(G,A)$. It is given by $\delta(c) = [a_\sigma]\in H^1(G,A) = Z^1(G,A)/B^1(G,A)$. We can extend our original sequence to a longer exact sequence:
+    $$\begin{tikzcd}[column sep=small]
+    0 \arrow[r] & A^G \arrow[r] & B^G \arrow[r] & C^G \arrow[r, "\delta"] & H^1(G,A) \arrow[r] & H^1(G,B) \arrow[r] & H^1(G,C) \arrow[r] & 0
+    \end{tikzcd}$$
+    This sequence is exact in Ab, and the map $\delta$ (called the connecting homomorphism) measures the failure of right-exactness of the fixed point functor.
+
+\begin{exercise}
+    Show that $H^1(G,-)$ is functorial and 
+    $$\begin{tikzcd}[column sep=small]
+    0 \arrow[r] & A^G \arrow[r] & B^G \arrow[r] & C^G \arrow[r] & H^1(G,A) \arrow[r] & H^1(G,B) \arrow[r] & H^1(G,C) \arrow[r] & 0
+    \end{tikzcd}$$
+    is exact. Find example with $\delta \neq 0$.
+\end{exercise}
+
+    \1 \textbf{In the non-abelian case}, we define 
+        \2 $H^0(G,A)=A^G$, the fixed points as before. 
+        \2 $H^1(G,A)=Z^1(F,A)/\sim$, where $\sim$ is an equivalence relation defined by: $a_\sigma \sim b_\sigma \iff \exists a' \in A : b_\sigma = (a')^{-1} \cdot a_\sigma \cdot \prescript{\sigma}{}{a'}$. 
+        \marginnote{We cannot expect $B^1(G,A)$ to be a subgroup. Why?}
+        \marginnote{$\prescript{\sigma}{}{a}$ denotes the action of $\sigma$ on $a$.}
+    \1[] In this case, $H^1(G,A)$ doesn't have a group structure, but it's a pointed set (a set with a distinguished element). We can still define a notion of exactness for sequences of pointed sets.
+\marginnote{Exactness in pointed sets $(A,*)$ is defined as $\im f = \ker g = g^{-1}(*)$}
+
+\marginnote{$A\leq_G B$ is $G$-equivariant inclusion.}
+\begin{proposition}
+    For $A\leq_G B$, we obtain $G\acts B/A$ and 
+    $$\begin{tikzcd}[column sep=small]
+    1 \arrow[r] & H^0(G,A) \arrow[r] & H^0(G,B) \arrow[r] & H^0(G,C) \arrow[r] & H^1(G,A) \arrow[r] & H^1(G,B)
+    \end{tikzcd}$$
+    is exact.
+\end{proposition}
+
+This is the \textbf{Galois cohomology}. Why do we care? In the non-commutative case $H^1(G,A)$ classifies \enquote{K-objects}. In our lecture we will use this to classify simple and simply connected linear algebraic $k$-groups $\bG$.
+
+\end{outline}
+
+\marginnote{Lecture 2, 17.10.24}
+
+\end{document}
+ 
\ No newline at end of file
diff --git a/preamble.tex b/preamble.tex
new file mode 100644
index 0000000..3fad7b8
--- /dev/null
+++ b/preamble.tex
@@ -0,0 +1,225 @@
+\documentclass{tufte-handout}
+
+\usepackage{amsmath}
+\usepackage{graphicx}
+\setkeys{Gin}{width=\linewidth,totalheight=\textheight,keepaspectratio}
+
+\usepackage{booktabs}
+\usepackage{units}
+\usepackage{fancyvrb}
+\fvset{fontsize=\normalsize}
+\usepackage{multicol}
+\usepackage{lipsum}
+\PassOptionsToPackage{dvipsnames}{xcolor}
+\usepackage{xcolor}
+\usepackage{amsmath, amsthm, thmtools}
+\usepackage{amssymb}
+\usepackage{cleveref}
+\usepackage{csquotes}
+\geometry{
+  marginparwidth=50mm % width of margin notes
+}
+%%%%%%%%% mathematical bold  %%%%%%%%%%%%%%%%%
+
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+\newcommand{\bB}{\mathbb{B}}
+\newcommand{\bC}{\mathbb{C}}
+\newcommand{\Cs}{\bC^\times}
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+\newcommand{\bW}{\mathbb{W}}
+\newcommand{\bX}{\mathbb{X}}
+\newcommand{\bY}{\mathbb{Y}}
+\newcommand{\Z}{\mathbb{Z}}
+
+%%%%%%%%% calligraphic %%%%%%%%%%%%%%%%%%%%%%%
+
+\newcommand{\mc}[1]{\mathcal{#1}}
+\newcommand{\cA}{\mathcal{A}}
+\newcommand{\cB}{\mathcal{B}}
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+\newcommand{\cW}{\mathcal{W}}
+\newcommand{\cX}{\mathcal{X}}
+\newcommand{\cY}{\mathcal{Y}}
+\newcommand{\cZ}{\mathcal{Z}}
+
+%%%%%%%%% mathematical fraktur  %%%%%%%%%%%%%%
+
+\newcommand{\mf}[1]{\mathfrak{#1}}
+\newcommand{\fa}{\mathfrak{a}}
+\newcommand{\fb}{\mathfrak{b}}
+\newcommand{\fc}{\mathfrak{c}}
+\newcommand{\fA}{\mathfrak{A}}
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+\newcommand{\fD}{\mathfrak{D}}
+\newcommand{\fE}{\mathfrak{E}}
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+\newcommand{\fU}{\mathfrak{U}}
+\newcommand{\fV}{\mathfrak{V}}
+\newcommand{\fW}{\mathfrak{W}}
+\newcommand{\fX}{\mathfrak{X}}
+\newcommand{\fY}{\mathfrak{Y}}
+\newcommand{\fZ}{\mathfrak{Z}}
+
+%%%%%%%%%    math operators    %%%%%%%%%%%%%%%
+
+\newcommand{\RP}{\mathbb{RP}^2}
+\newcommand{\gen}[1]{\langle #1\rangle}
+\newcommand{\Id}{\mathrm{Id}}
+\DeclareMathOperator{\im}{im}
+\DeclareMathOperator{\ggt}{ggT}
+\DeclareMathOperator{\kgv}{kgV}
+\DeclareMathOperator{\Aut}{Aut}
+\DeclareMathOperator{\Hom}{Hom}
+\DeclareMathOperator{\Iso}{Iso}
+\DeclareMathOperator{\ord}{ord}
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+\DeclareMathOperator{\SL}{SL}
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+\DeclareMathOperator{\Th}{Th}
+\DeclareMathOperator{\On}{On}
+\DeclareMathOperator{\Spec}{Spec}
+\DeclareMathOperator{\coker}{coker}
+\DeclareMathOperator{\supp}{supp}
+
+%%%%%%%%%    thmtools environments  %%%%%%%%%%%%%%%
+
+\declaretheoremstyle[
+shaded={
+    rulecolor=Lavender!35,
+    rulewidth=2pt,
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+\declaretheorem[
+name=Lemma, 
+style=lightblue, 
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+\declaretheorem[
+name=Proposition, 
+style=lightblue, 
+sibling=definition
+]{proposition}
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+\declaretheorem[
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+style=lightblue, 
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+style=lightblue, 
+sibling=definition
+]{exercise}
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+\declaretheorem[
+name=Note, 
+style=red, 
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+
+\setlength{\headheight}{14.0pt}
\ No newline at end of file
diff --git a/tufte-book.cls b/tufte-book.cls
new file mode 100644
index 0000000..11d5015
--- /dev/null
+++ b/tufte-book.cls
@@ -0,0 +1,80 @@
+\NeedsTeXFormat{LaTeX2e}[1994/06/01]
+
+\ProvidesClass{tufte-book}[2009/12/11 v3.5.0 Tufte-book class]
+
+%%
+% Declare we're tufte-book
+\newcommand{\@tufte@class}{book}% the base LaTeX class (defaults to the article/handout style)
+\newcommand{\@tufte@pkgname}{tufte-book}% the name of the package (defaults to tufte-handout)
+
+%%
+% Load the common style elements
+\input{tufte-common.def}
+
+
+%%
+% Set up any book-specific stuff now
+
+%%
+% The front matter in Tufte's /Beautiful Evidence/ contains everything up
+% to the opening page of Chapter 1.  The running heads, when they appear,
+% contain only the (arabic) page number in the outside corner.
+%\newif\if@mainmatter \@mainmattertrue
+\renewcommand\frontmatter{%
+  \cleardoublepage%
+  \@mainmatterfalse%
+  \pagenumbering{arabic}%
+  %\pagestyle{plain}%
+  \fancyhf{}%
+  \ifthenelse{\boolean{@tufte@twoside}}%
+    {\fancyhead[LE,RO]{\thepage}}%
+    {\fancyhead[RE,RO]{\thepage}}%
+}
+
+
+%%
+% The main matter in Tufte's /Beautiful Evidence/ doesn't restart the page
+% numbering---it continues where it left off in the front matter.
+\renewcommand\mainmatter{%
+  \cleardoublepage%
+  \@mainmattertrue%
+  \fancyhf{}%
+  \ifthenelse{\boolean{@tufte@twoside}}%
+    {% two-side
+      \renewcommand{\chaptermark}[1]{\markboth{##1}{}}%
+      \fancyhead[LE]{\thepage\quad\smallcaps{\newlinetospace{\plaintitle}}}% book title
+      \fancyhead[RO]{\smallcaps{\newlinetospace{\leftmark}}\quad\thepage}% chapter title
+    }%
+    {% one-side
+      \fancyhead[RE,RO]{\smallcaps{\newlinetospace{\plaintitle}}\quad\thepage}% book title
+    }%
+}
+
+
+%%
+% The back matter contains appendices, indices, glossaries, endnotes,
+% biliographies, list of contributors, illustration credits, etc.
+\renewcommand\backmatter{%
+  \if@openright%
+    \cleardoublepage%
+  \else%
+    \clearpage%
+  \fi%
+  \@mainmatterfalse%
+}
+
+%%
+% Only show the chapter titles in the table of contents
+\setcounter{tocdepth}{0}
+
+%%
+% If there is a `tufte-book-local.sty' file, load it.
+
+\IfFileExists{tufte-book-local.tex}
+  {\input{tufte-book-local}
+   \TufteInfoNL{Loading tufte-book-local.tex}}
+  {}
+
+%%
+% End of file
+\endinput
diff --git a/tufte-common.def b/tufte-common.def
new file mode 100644
index 0000000..92f8b91
--- /dev/null
+++ b/tufte-common.def
@@ -0,0 +1,2025 @@
+%%
+%% This file contains the code that is common to the Tufte-LaTeX document classes.
+%%
+
+\ProvidesFile{tufte-common.def}[2015/06/21 v3.5.2 Common code for the Tufte-LaTeX styles]
+
+%%
+% The `xkeyval' package simplifies the user interface for the document class options
+\RequirePackage{xkeyval}
+
+%%
+% We use the `xifthen' package to handle our package option switches
+\RequirePackage{xifthen}
+
+%%
+% Define some shortcut macros for error/warning/info logging.
+\RequirePackage{hardwrap}
+\GenerateClassLogMacros[@tufte]{\@tufte@pkgname}
+\newcommand{\@tufte@debug@info}[1]{\ifthenelse{\boolean{@tufte@debug}}{\@tufte@info{#1}}{}}
+\newcommand{\@tufte@debug@info@noline}[1]{\ifthenelse{\boolean{@tufte@debug}}{\@tufte@info@noline{#1}}{}}
+
+%%
+% `debug' option -- provides more information in the .log file for use in
+% troubleshooting problems
+\newboolean{@tufte@debug}
+\DeclareOptionX[tufte]<common>{debug}{\setboolean{@tufte@debug}{true}}
+
+%%
+% `nofonts' option -- doesn't load any fonts
+% `fonts' option -- tries to load fonts
+\newboolean{@tufte@loadfonts}\setboolean{@tufte@loadfonts}{true}
+\DeclareOptionX[tufte]<common>{fonts}{\setboolean{@tufte@loadfonts}{true}}
+\DeclareOptionX[tufte]<common>{nofonts}{\setboolean{@tufte@loadfonts}{false}}
+
+%%
+% `nols' option -- doesn't configure letterspacing
+% `ls' option -- configures letterspacing
+\newboolean{@tufte@letterspace}\setboolean{@tufte@letterspace}{true}
+\DeclareOptionX[tufte]<common>{ls}{\setboolean{@tufte@letterspace}{true}}
+\DeclareOptionX[tufte]<common>{nols}{\setboolean{@tufte@letterspace}{false}}
+
+%%
+% `nobib' option -- doesn't load natbib or adjust the \cite command
+\newboolean{@tufte@loadnatbib}\setboolean{@tufte@loadnatbib}{true}
+\DeclareOptionX[tufte]<common>{nobib}{\setboolean{@tufte@loadnatbib}{false}}
+
+%%
+% `titlepage' option -- creates a full title page with \maketitle
+
+\newboolean{@tufte@titlepage}
+\DeclareOptionX[tufte]<common>{titlepage}{\setboolean{@tufte@titlepage}{true}}
+\DeclareOptionX[tufte]<common>{notitlepage}{\setboolean{@tufte@titlepage}{false}}
+
+%%
+% `a4paper' option
+
+\newboolean{@tufte@afourpaper}
+\DeclareOptionX[tufte]<common>{a4paper}{\setboolean{@tufte@afourpaper}{true}}
+
+%%
+% `b5paper' option
+
+\newboolean{@tufte@bfivepaper}
+\DeclareOptionX[tufte]<common>{b5paper}{\setboolean{@tufte@bfivepaper}{true}}
+
+%%
+% `sfsidenotes' option -- typesets sidenotes in sans serif typeface
+
+\newboolean{@tufte@sfsidenotes}
+\DeclareOptionX[tufte]<common>{sfsidenotes}{\setboolean{@tufte@sfsidenotes}{true}}
+
+%%
+% `symmetric' option -- puts marginpar space to the outside edge of the page
+%   Note: this option forces the twoside option (see the .cls files)
+
+\newboolean{@tufte@symmetric}
+\DeclareOptionX[tufte]<common>{symmetric}{
+  \setboolean{@tufte@symmetric}{true}
+  \@tufte@info@noline{The `symmetric' option implies `twoside'}
+  \ExecuteOptionsX[tufte]<common>{twoside}
+}
+
+%%
+% `twoside' option -- alternates running heads
+
+\newboolean{@tufte@twoside}
+\DeclareOptionX[tufte]<common>{twoside}{%
+  \setboolean{@tufte@twoside}{true}
+  \@tufte@info@noline{Passing the `twoside' option to the `\@tufte@class' class}
+  \PassOptionsToClass{twoside}{\@tufte@class}
+}
+
+%%
+% `notoc' option -- suppresses the Tufte-style table of contents
+
+\newboolean{@tufte@toc}
+\setboolean{@tufte@toc}{true}
+\DeclareOptionX[tufte]<common>{notoc}{\setboolean{@tufte@toc}{false}}
+\DeclareOptionX[tufte]<common>{toc}{\setboolean{@tufte@toc}{true}}
+
+%%
+% `justified' option -- uses fully justified text (flush left and flush
+% right) instead of ragged right.
+
+\newboolean{@tufte@justified}
+\DeclareOptionX[tufte]<common>{justified}{\setboolean{@tufte@justified}{true}}
+
+%%
+% `bidi' option -- loads the bidi package for bi-directional text
+
+\newboolean{@tufte@loadbidi}
+\DeclareOptionX[tufte]<common>{bidi}{\setboolean{@tufte@loadbidi}{true}}
+\DeclareOptionX[tufte]<common>{nobidi}{\setboolean{@tufte@loadbidi}{false}}
+
+%%
+% `nohyper' option -- suppresses loading of the hyperref package
+
+\newboolean{@tufte@loadhyper}
+\setboolean{@tufte@loadhyper}{true}
+\DeclareOptionX[tufte]<common>{hyper}{\setboolean{@tufte@loadhyper}{true}}
+\DeclareOptionX[tufte]<common>{nohyper}{\setboolean{@tufte@loadhyper}{false}}
+
+%%
+% `sidenote', `marginnote', `caption', `citation', `marginals' options
+% Each allows one of {justified,raggedleft,raggedright,raggedouter,auto}.
+
+\newcommand*{\@tufte@sidenote@justification}{\@tufte@justification@autodetect}
+\define@choicekey*+[tufte]{common}{sidenote}[\@tufte@kvtext\@tufte@kvnum]{justified,raggedleft,raggedright,raggedouter,auto}[auto]{%
+  \ifcase\@tufte@kvnum\relax
+    \renewcommand*{\@tufte@sidenote@justification}{\justifying}% justified
+  \or
+    \renewcommand*{\@tufte@sidenote@justification}{\RaggedLeft}% ragged left
+  \or
+    \renewcommand*{\@tufte@sidenote@justification}{\RaggedRight}% ragged right
+  \or
+    \renewcommand*{\@tufte@sidenote@justification}{\@tufte@justification@outer}% ragged outer (flush right on verso pages, flush left on recto pages)
+  \or
+    \renewcommand*{\@tufte@sidenote@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+  \fi
+}{%
+  \@tufte@warning@noline{Invalid option `#1' for sidenote key. Must be one of: justified, raggedleft, raggedright, raggedouter, auto}
+  \renewcommand*{\@tufte@sidenote@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+}
+
+\newcommand*{\@tufte@marginnote@justification}{\@tufte@justification@autodetect}
+\define@choicekey*+[tufte]{common}{marginnote}[\@tufte@kvtext\@tufte@kvnum]{justified,raggedleft,raggedright,raggedouter,auto}[auto]{%
+  \ifcase\@tufte@kvnum\relax
+    \renewcommand*{\@tufte@marginnote@justification}{\justifying}% justified
+  \or
+    \renewcommand*{\@tufte@marginnote@justification}{\RaggedLeft}% ragged left
+  \or
+    \renewcommand*{\@tufte@marginnote@justification}{\RaggedRight}% ragged right
+  \or
+    \renewcommand*{\@tufte@marginnote@justification}{\@tufte@justification@outer}% ragged outer (flush right on verso pages, flush left on recto pages)
+  \or
+    \renewcommand*{\@tufte@marginnote@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+  \fi
+}{%
+  \@tufte@warning@noline{Invalid option `#1' for marginnote key. Must be one of: justified, raggedleft, raggedright, raggedouter, auto}
+  \renewcommand*{\@tufte@marginnote@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+}
+
+\newcommand*{\@tufte@caption@justification}{\@tufte@justification@autodetect}
+\define@choicekey*+[tufte]{common}{caption}[\@tufte@kvtext\@tufte@kvnum]{justified,raggedleft,raggedright,raggedouter,auto}[auto]{%
+  \ifcase\@tufte@kvnum\relax
+    \renewcommand*{\@tufte@caption@justification}{\justifying}% justified
+  \or
+    \renewcommand*{\@tufte@caption@justification}{\RaggedLeft}% ragged left
+  \or
+    \renewcommand*{\@tufte@caption@justification}{\RaggedRight}% ragged right
+  \or
+    \renewcommand*{\@tufte@caption@justification}{\@tufte@justification@caption@outer}% ragged outer (flush right on verso pages, flush left on recto pages)
+  \or
+    \renewcommand*{\@tufte@caption@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+  \fi
+}{%
+  \@tufte@warning@noline{Invalid option `#1' for caption key. Must be one of: justified, raggedleft, raggedright, raggedouter, auto}
+  \renewcommand*{\@tufte@caption@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+}
+
+\newcommand*{\@tufte@citation@justification}{\@tufte@justification@autodetect}
+\define@choicekey*+[tufte]{common}{citation}[\@tufte@kvtext\@tufte@kvnum]{justified,raggedleft,raggedright,raggedouter,auto}[auto]{%
+  \ifcase\@tufte@kvnum\relax
+    \renewcommand*{\@tufte@citation@justification}{\justifying}% justified
+  \or
+    \renewcommand*{\@tufte@citation@justification}{\RaggedLeft}% ragged left
+  \or
+    \renewcommand*{\@tufte@citation@justification}{\RaggedRight}% ragged right
+  \or
+    \renewcommand*{\@tufte@citation@justification}{\@tufte@justification@outer}% ragged outer (flush right on verso pages, flush left on recto pages)
+  \or
+    \renewcommand*{\@tufte@citation@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+  \fi
+}{%
+  \@tufte@warning@noline{Invalid option `#1' for citation key. Must be one of: justified, raggedleft, raggedright, raggedouter, auto}
+  \renewcommand*{\@tufte@citation@justification}{\@tufte@justification@autodetect}% autodetects best justification mode based on all class options
+}
+
+% The ``marginals'' key simultaneously sets the same justification for all marginal material
+\define@choicekey*+[tufte]{common}{marginals}[\@tufte@kvtext\@tufte@kvnum]{justified,raggedleft,raggedright,raggedouter,auto}[auto]{%
+  \ifcase\@tufte@kvnum\relax
+    \ExecuteOptionsX[tufte]<common>{citation=justified,sidenote=justified,caption=justified,marginnote=justified}% justified
+  \or
+    \ExecuteOptionsX[tufte]<common>{citation=raggedleft,sidenote=raggedleft,caption=raggedleft,marginnote=raggedleft}% ragged left
+  \or
+    \ExecuteOptionsX[tufte]<common>{citation=raggedright,sidenote=raggedright,caption=raggedright,marginnote=raggedright}% ragged right
+  \or
+    \ExecuteOptionsX[tufte]<common>{citation=raggedouter,sidenote=raggedouter,caption=raggedouter,marginnote=raggedouter}% ragged outer (flush right on verso pages, flush left on recto pages)
+  \or
+    \ExecuteOptionsX[tufte]<common>{citation=auto,sidenote=auto,caption=auto,marginnote=auto}% autodetects best justification mode based on all class options
+  \fi
+}{%
+  \@tufte@warning@noline{Invalid option `#1' for marginals key. Must be one of: justified, raggedleft, raggedright, raggedouter, auto}
+  \ExecuteOptionsX[tufte]<common>{citation=auto,sidenote=auto,caption=auto,marginnote=auto}% autodetects best justification mode based on all class options
+}
+
+
+%%
+% Unsupported options
+
+\newcommand{\@tufte@unsupported@option}[1]{\@tufte@warning@noline{Option `#1' is not supported -- ignoring option}\OptionNotUsed}
+
+\DeclareOptionX[tufte]<common>{10pt}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{11pt}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{12pt}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{a5paper}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{executivepaper}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{legalpaper}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{landscape}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{onecolumn}{\@tufte@unsupported@option{\CurrentOption}}
+\DeclareOptionX[tufte]<common>{twocolumn}{\@tufte@unsupported@option{\CurrentOption}}
+
+%%
+% Default `book' and `handout' options
+
+\ifthenelse{\equal{\@tufte@pkgname}{tufte-book}}
+  {\ExecuteOptionsX[tufte]<common>{titlepage}}
+  {\ExecuteOptionsX[tufte]<common>{notitlepage}}
+
+
+\DeclareOptionX*{%
+  \@tufte@info@noline{Passing \CurrentOption\space to the `\@tufte@class' class.}%
+  \PassOptionsToClass{\CurrentOption}{\@tufte@class}%
+}
+\ProcessOptionsX*[tufte]<common>\relax
+
+%%
+% Load the appropriate base class
+\@tufte@info@noline{Loading the base class `\@tufte@class'}
+\LoadClass{\@tufte@class}
+
+%%
+% Detect whether we're in two-side mode or not.  (Used to set up running
+% heads later.)
+
+\ifthenelse{\boolean{@twoside}}
+  {\setboolean{@tufte@twoside}{true}}
+  {}
+
+
+
+%%
+% Detect if we're using pdfLaTeX
+
+\newboolean{@tufte@pdf}
+\IfFileExists{ifpdf.sty}{%
+  \RequirePackage{ifpdf}
+  \ifthenelse{\boolean{pdf}}
+    {\setboolean{@tufte@pdf}{true}}
+    {\setboolean{@tufte@pdf}{false}}
+}{% assume we're not using pdfTex?
+  \setboolean{@tufte@pdf}{false}
+}
+
+%%
+% Detect if we're using XeLaTeX
+
+\newboolean{@tufte@xetex}
+\IfFileExists{ifxetex.sty}{%
+  \RequirePackage{ifxetex}
+  \ifthenelse{\boolean{xetex}}
+    {\setboolean{@tufte@xetex}{true}}
+    {\setboolean{@tufte@xetex}{false}}
+}{% not using xelatex
+  \setboolean{@tufte@xetex}{false}
+}
+
+\ifthenelse{\boolean{@tufte@xetex}}{%
+  \RequirePackage{xltxtra}% xltxtra loads xunicode and fontspec; must be loaded before bidi
+}{}
+
+%%
+% Detect if we're using LuaTeX
+
+\newboolean{@tufte@luatex}
+\IfFileExists{ifluatex.sty}{%
+  \RequirePackage{ifluatex}
+  \ifthenelse{\boolean{luatex}}
+    {\setboolean{@tufte@luatex}{true}}
+    {\setboolean{@tufte@luatex}{false}}
+}{% not using luatex
+  \setboolean{@tufte@luatex}{false}
+}
+
+\ifthenelse{\boolean{@tufte@luatex}}{%
+  \RequirePackage{fontspec}
+  \RequirePackage[osf,sc]{mathpazo}
+  \setmainfont[Renderer=Basic, Numbers=OldStyle, Scale = 1.0]{TeX Gyre Pagella}
+  \setsansfont[Renderer=Basic, Scale=0.90]{TeX Gyre Heros}
+  \setmonofont[Renderer=Basic]{TeX Gyre Cursor}
+}{}
+
+%%
+% Globally sets the length
+
+\newcommand*{\gsetlength}[2]{%
+  \setlength{#1}{#2}%
+  \global#1=#1\relax%
+}
+
+%%
+% Globally sets a boolean
+
+\newcommand*{\gsetboolean}[2]{% based on code from ifthen pkg
+  \lowercase{\def\@tempa{#2}}%
+  \@ifundefined{@tempswa\@tempa}%
+    {\PackageError{ifthen}{You can only set a boolean to `true' or `false'}\@ehc}%
+    {\@ifundefined{#1\@tempa}%
+      {\PackageError{ifthen}{Boolean #1 undefined}\@ehc}%
+      {\global\csname#1\@tempa\endcsname}%
+    }%
+}
+
+%%
+% The titlesec and titletoc packages are used to change the style of the
+% section headings.  These packages should be loaded before the hyperref
+% package.
+
+\RequirePackage{titlesec,titletoc}
+
+%%%
+%% Loads the hyperref package and sets some default options.
+
+\newcommand{\TufteLoadHyperref}{%
+  \ifthenelse{\boolean{@tufte@xetex}}
+    {\RequirePackage[unicode,hyperfootnotes=false,xetex]{hyperref}}
+    {\RequirePackage[unicode,hyperfootnotes=false]{hyperref}}
+  \hypersetup{%
+    pdfborder = {0 0 0},
+    bookmarksdepth = section,
+    citecolor = DarkGreen,
+    linkcolor = DarkBlue,
+    urlcolor = DarkGreen,
+  }%
+}
+
+%%%
+%% Load the `hyperref' package.
+
+\ifthenelse{\boolean{@tufte@loadhyper}}{%
+  \TufteLoadHyperref%
+}{% hyperfootnotes override our modifications to the \footnote* and \@footnote* commands.
+  \PassOptionsToPackage{hyperfootnotes=false}{hyperref}
+}
+
+%%
+% Set the font sizes and baselines to match Tufte's books
+\renewcommand\normalsize{%
+   \@setfontsize\normalsize\@xpt{14}%
+   \abovedisplayskip 10\p@ \@plus2\p@ \@minus5\p@
+   \abovedisplayshortskip \z@ \@plus3\p@
+   \belowdisplayshortskip 6\p@ \@plus3\p@ \@minus3\p@
+   \belowdisplayskip \abovedisplayskip
+   \let\@listi\@listI}
+\normalbaselineskip=14pt
+\normalsize
+\renewcommand\small{%
+   \@setfontsize\small\@ixpt{12}%
+   \abovedisplayskip 8.5\p@ \@plus3\p@ \@minus4\p@
+   \abovedisplayshortskip \z@ \@plus2\p@
+   \belowdisplayshortskip 4\p@ \@plus2\p@ \@minus2\p@
+   \def\@listi{\leftmargin\leftmargini
+               \topsep 4\p@ \@plus2\p@ \@minus2\p@
+               \parsep 2\p@ \@plus\p@ \@minus\p@
+               \itemsep \parsep}%
+   \belowdisplayskip \abovedisplayskip
+}
+\renewcommand\footnotesize{%
+   \@setfontsize\footnotesize\@viiipt{10}%
+   \abovedisplayskip 6\p@ \@plus2\p@ \@minus4\p@
+   \abovedisplayshortskip \z@ \@plus\p@
+   \belowdisplayshortskip 3\p@ \@plus\p@ \@minus2\p@
+   \def\@listi{\leftmargin\leftmargini
+               \topsep 3\p@ \@plus\p@ \@minus\p@
+               \parsep 2\p@ \@plus\p@ \@minus\p@
+               \itemsep \parsep}%
+   \belowdisplayskip \abovedisplayskip
+}
+\renewcommand\scriptsize{\@setfontsize\scriptsize\@viipt\@viiipt}
+\renewcommand\tiny{\@setfontsize\tiny\@vpt\@vipt}
+\renewcommand\large{\@setfontsize\large\@xipt{15}}
+\renewcommand\Large{\@setfontsize\Large\@xiipt{16}}
+\renewcommand\LARGE{\@setfontsize\LARGE\@xivpt{18}}
+\renewcommand\huge{\@setfontsize\huge\@xxpt{30}}
+\renewcommand\Huge{\@setfontsize\Huge{24}{36}}
+
+\setlength\leftmargini   {1pc}
+\setlength\leftmarginii  {1pc}
+\setlength\leftmarginiii {1pc}
+\setlength\leftmarginiv  {1pc}
+\setlength\leftmarginv   {1pc}
+\setlength\leftmarginvi  {1pc}
+\setlength\labelsep      {.5pc}
+\setlength\labelwidth    {\leftmargini}
+\addtolength\labelwidth{-\labelsep}
+
+%%
+% \RaggedRight allows hyphenation
+
+\setlength{\parindent}{1.0pc}%
+\setlength{\parskip}{0pt}%
+\RequirePackage{ragged2e}
+\setlength{\RaggedRightRightskip}{\z@ plus 0.08\hsize}
+
+% Paragraph indentation and separation for normal text
+\newcommand{\@tufte@reset@par}{%
+  \setlength{\RaggedRightParindent}{1.0pc}%
+  \setlength{\JustifyingParindent}{1.0pc}%
+  \setlength{\parindent}{1pc}%
+  \setlength{\parskip}{0pt}%
+}
+\@tufte@reset@par
+
+% Paragraph indentation and separation for marginal text
+\newcommand{\@tufte@margin@par}{%
+  \setlength{\RaggedRightParindent}{0.5pc}%
+  \setlength{\JustifyingParindent}{0.5pc}%
+  \setlength{\parindent}{0.5pc}%
+  \setlength{\parskip}{0pt}%
+}
+
+
+%%
+% Set page layout geometry
+
+\RequirePackage[letterpaper,left=0.8in,top=1in,headsep=2\baselineskip,textwidth=30pc,marginparsep=2pc,marginparwidth=10pc,textheight=44\baselineskip,headheight=\baselineskip]{geometry}
+
+\ifthenelse{\boolean{@tufte@afourpaper}}
+  {\geometry{a4paper,left=24.8mm,top=27.4mm,headsep=2\baselineskip,textwidth=130mm,marginparsep=8.2mm,marginparwidth=49.4mm,textheight=49\baselineskip,headheight=\baselineskip}}
+  {}
+
+\ifthenelse{\boolean{@tufte@bfivepaper}}
+  {\geometry{paperwidth=176mm,paperheight=250mm,left=14.66mm,top=13.88mm,textwidth=130mm,marginparsep=7.33mm,marginparwidth=36.66mm,textheight=38\baselineskip,includehead}}
+  {}
+
+\ifthenelse{\boolean{@tufte@symmetric}}
+  {}
+  {\geometry{asymmetric}}% forces internal LaTeX `twoside'
+
+
+%%
+% Separation marginpars by a line's worth of space.
+
+\setlength\marginparpush{10pt}
+
+%%
+% Font for margin items
+
+\ifthenelse{\boolean{@tufte@sfsidenotes}}
+  {\newcommand{\@tufte@marginfont}{\normalfont\footnotesize\sffamily}}
+  {\newcommand{\@tufte@marginfont}{\normalfont\footnotesize}}
+
+\newcommand*{\@tufte@sidenote@font}{\@tufte@marginfont}
+\newcommand*{\@tufte@caption@font}{\@tufte@marginfont}
+\newcommand*{\@tufte@marginnote@font}{\@tufte@marginfont}
+\newcommand*{\@tufte@citation@font}{\@tufte@marginfont}
+
+\newcommand*{\setsidenotefont}[1]{\renewcommand*{\@tufte@sidenote@font}{#1}}
+\newcommand*{\setcaptionfont}[1]{\renewcommand*{\@tufte@caption@font}{#1}}
+\newcommand*{\setmarginnotefont}[1]{\renewcommand*{\@tufte@marginnote@font}{#1}}
+\newcommand*{\setcitationfont}[1]{\renewcommand*{\@tufte@citation@font}{#1}}
+
+%%
+% Set the justification based on the `justified' class option
+
+\newcommand{\@tufte@justification}{%
+  \ifthenelse{\boolean{@tufte@justified}}%
+    {\justifying}%
+    {\RaggedRight}%
+}
+
+%%
+% Turn off section numbering
+
+%\setcounter{secnumdepth}{-1}
+
+%%
+% Tighten up space between displays (e.g., a figure or table) and make symmetric
+
+\setlength\abovedisplayskip{6pt plus 2pt minus 4pt}
+\setlength\belowdisplayskip{6pt plus 2pt minus 4pt}
+
+%%
+% To implement full-width display environments
+
+\newboolean{@tufte@changepage}
+\IfFileExists{changepage.sty}{%
+  \@tufte@debug@info@noline{Found changepage.sty}
+  \RequirePackage[strict]{changepage}
+  \setboolean{@tufte@changepage}{true}
+}{%
+  \@tufte@debug@info@noline{Found chngpage.sty}
+  \RequirePackage[strict]{chngpage}
+  \setboolean{@tufte@changepage}{false}
+}
+
+% Write our own aliases for the \checkoddpage and \ifoddpage or \ifcpoddpage commands
+\newboolean{@tufte@odd@page}
+\setboolean{@tufte@odd@page}{true}
+\newcommand*{\@tufte@checkoddpage}{%
+  \checkoddpage%
+  \ifthenelse{\boolean{@tufte@changepage}}{%
+    \ifoddpage%
+      \setboolean{@tufte@odd@page}{true}%
+    \else%
+      \setboolean{@tufte@odd@page}{false}%
+    \fi%
+  }{%
+    \ifcpoddpage%
+      \setboolean{@tufte@odd@page}{true}%
+    \else%
+      \setboolean{@tufte@odd@page}{false}%
+    \fi%
+  }%
+}
+
+%%
+% Compute lengths used for full-width displays
+
+\newlength{\@tufte@overhang}% used by the fullwidth environment and the running heads
+\newlength{\@tufte@fullwidth}
+\newlength{\@tufte@caption@fill}
+
+\newcommand{\TufteRecalculate}{%
+  \setlength{\@tufte@overhang}{\marginparwidth}
+  \addtolength{\@tufte@overhang}{\marginparsep}
+
+  \setlength{\@tufte@fullwidth}{\textwidth}
+  \addtolength{\@tufte@fullwidth}{\marginparsep}
+  \addtolength{\@tufte@fullwidth}{\marginparwidth}
+
+  \setlength{\@tufte@caption@fill}{\textwidth}
+  \addtolength{\@tufte@caption@fill}{\marginparsep}
+}
+
+\AtBeginDocument{\TufteRecalculate}
+
+%%
+% Modified \title, \author, and \date commands.  These store the
+% (footnote-less) values in \plaintitle, \plainauthor, and \thedate, respectively.
+
+\newcommand{\plaintitle}{}%     plain-text-only title
+\newcommand{\plainauthor}{}%    plain-text-only author
+\newcommand{\plainpublisher}{}% plain-text-only publisher
+
+\newcommand{\thanklesstitle}{}%     full title text minus \thanks{}
+\newcommand{\thanklessauthor}{}%    full author text minus \thanks{}
+\newcommand{\thanklesspublisher}{}% full publisher minus \thanks{}
+
+\newcommand{\@publisher}{}% full publisher with \thanks{}
+\newcommand{\thedate}{\today}
+
+% TODO Fix it so that \thanks is not spaced out (with `soul') and can be
+% used in \maketitle when the `sfsidenotes' option is provided.
+\renewcommand{\thanks}[1]{\NoCaseChange{\footnote{#1}}}
+
+\renewcommand{\title}[2][]{%
+  \gdef\@title{#2}%
+  \begingroup%
+    % TODO store contents of \thanks command
+    \renewcommand{\thanks}[1]{}% swallow \thanks contents
+    \protected@xdef\thanklesstitle{#2}%
+  \endgroup%
+  \ifthenelse{\isempty{#1}}%
+    {\renewcommand{\plaintitle}{\thanklesstitle}}% use thankless title
+    {\renewcommand{\plaintitle}{#1}}% use provided plain-text title
+  \ifthenelse{\isundefined{\hypersetup}}%
+    {}% hyperref is not loaded; do nothing
+    {\hypersetup{pdftitle={\plaintitle}}}% set the PDF metadata title
+}
+
+\let\@author\@empty% suppress default latex.ltx ``no author'' warning
+\renewcommand{\author}[2][]{%
+  \ifthenelse{\isempty{#2}}{}{\gdef\@author{#2}}%
+  \begingroup%
+    % TODO store contents of \thanks command
+    \renewcommand{\thanks}[1]{}% swallow \thanks contents
+    \protected@xdef\thanklessauthor{#2}%
+  \endgroup%
+  \ifthenelse{\isempty{#1}}%
+    {\renewcommand{\plainauthor}{\thanklessauthor}}% use thankless author
+    {\renewcommand{\plainauthor}{#1}}% use provided plain-text author
+  \ifthenelse{\isundefined{\hypersetup}}%
+    {}% hyperref is not loaded; do nothing
+    {\hypersetup{pdfauthor={\plainauthor}}}% set the PDF metadata author
+}
+
+\renewcommand{\date}[1]{%
+  \gdef\@date{#1}%
+  \begingroup%
+    % TODO store contents of \thanks command
+    \renewcommand{\thanks}[1]{}% swallow \thanks contents
+    \protected@xdef\thedate{#1}%
+  \endgroup%
+}
+
+%%
+% Provides a \publisher command to set the publisher
+
+\newcommand{\publisher}[2][]{%
+  \gdef\@publisher{#2}%
+  \begingroup%
+    \renewcommand{\thanks}[1]{}% swallow \thanks contents
+    \protected@xdef\thanklesspublisher{#2}%
+  \endgroup%
+  \ifthenelse{\isempty{#1}}
+    {\renewcommand{\plainpublisher}{\thanklesspublisher}}% use thankless publisher
+    {\renewcommand{\plainpublisher}{#1}}% use provided plain-text publisher
+}
+
+% TODO: Test \hypersetup{pdfauthor,pdftitle} with DVI and XeTeX
+
+%%
+% Require paralist package for tighter lists
+
+\RequirePackage{paralist}
+
+% Add rightmargin to compactenum
+
+\def\@compactenum@{%
+  \expandafter\list\csname label\@enumctr\endcsname{%
+    \usecounter{\@enumctr}%
+    \rightmargin=2em% added this
+    \parsep\plparsep
+    \itemsep\plitemsep
+    \topsep\pltopsep
+    \partopsep\plpartopsep
+    \def\makelabel##1{\hss\llap{##1}}}}
+
+%%
+% Improved letterspacing of small caps and all-caps text.
+%
+% First, try to use the `microtype' package, if it's available. 
+% Failing that, try to use the `soul' package, if it's available.
+% Failing that, well, I give up.
+
+\DeclareTextFontCommand{\textsmallcaps}{\scshape}
+
+\RequirePackage{textcase} % provides \MakeTextUppercase and \MakeTextLowercase
+\def\allcapsspacing{\@tufte@warning{Proper spacing of ALL-CAPS letters has not been set up.}}
+\def\smallcapsspacing{\@tufte@warning{Proper spacing of small-caps letters has not been set up.}}
+\newcommand{\allcaps}[1]{\allcapsspacing{\MakeTextUppercase{#1}}}
+\newcommand{\smallcaps}[1]{\smallcapsspacing{\MakeTextLowercase{#1}}}
+
+% If we're using pdfLaTeX v1.40+, use the letterspace package. 
+% If we're using pdfLaTex < v1.40, use the soul package.
+% If we're using XeLaTeX, use XeLaTeX letterspacing options.
+% Otherwise fall back on the soul package.
+
+\ifthenelse{\boolean{@tufte@pdf}}
+  {\@tufte@debug@info@noline{ifpdf = true}}
+  {\@tufte@debug@info@noline{ifpdf = false}}
+
+\ifthenelse{\boolean{@tufte@xetex}}
+  {\@tufte@debug@info@noline{ifxetex = true}}
+  {\@tufte@debug@info@noline{ifxetex = false}}
+
+% Check pdfLaTeX version
+\def\@tufte@pdftexversion{0}
+\ifx\normalpdftexversion\@undefined \else
+  \let\pdftexversion \normalpdftexversion
+  \let\pdftexrevision\normalpdftexrevision
+  \let\pdfoutput     \normalpdfoutput
+\fi
+\ifx\pdftexversion\@undefined \else
+  \ifx\pdftexversion\relax \else
+    \def\@tufte@pdftexversion{6}
+    \ifnum\pdftexversion < 140
+      \def\@tufte@pdftexversion{5}
+    \fi
+  \fi
+\fi
+
+\newboolean{@tufte@letterspace@pkg@prereqs}
+\setboolean{@tufte@letterspace@pkg@prereqs}{true}
+\ifnum\@tufte@pdftexversion<6
+  \setboolean{@tufte@letterspace@pkg@prereqs}{false}
+\fi
+
+
+\newcommand{\@tufte@letterspacing@soul}{%
+  \RequirePackage{soul}%
+  \sodef\allcapsspacing{}{0.15em}{0.65em}{0.6em}%
+  \sodef\smallcapsspacing{}{0.075em}{0.5em}{0.6em}%
+  \sodef\sotextsc{\scshape}{0.075em}{0.5em}{0.6em}%
+  \renewcommand{\allcaps}[1]{\allcapsspacing{\MakeTextUppercase{##1}}}%
+  \renewcommand{\smallcaps}[1]{\smallcapsspacing{\scshape\MakeTextLowercase{##1}}}%
+  \renewcommand{\textsc}[1]{\sotextsc{##1}}%
+}
+
+\newcommand{\@tufte@letterspacing@letterspace}{%
+  \@tufte@debug@info@noline{Modern version of pdfTeX detected. Using `letterspace' package}%
+  \RequirePackage{letterspace}%
+  % Set up letterspacing (using microtype package) -- requires pdfTeX v1.40+
+  \renewcommand{\allcapsspacing}[1]{\textls[200]{##1}}%
+  \renewcommand{\smallcapsspacing}[1]{\textls[50]{##1}}%
+  \renewcommand{\allcaps}[1]{\allcapsspacing{\MakeTextUppercase{##1}}}%
+  \renewcommand{\smallcaps}[1]{\smallcapsspacing{\scshape\MakeTextLowercase{##1}}}%
+  \renewcommand{\textsc}[1]{\smallcapsspacing{\textsmallcaps{##1}}}%
+}
+
+\ifthenelse{\boolean{@tufte@letterspace}}{%
+  \ifthenelse{\boolean{@tufte@pdf}\AND\boolean{@tufte@letterspace@pkg@prereqs}\AND\NOT\boolean{@tufte@xetex}}{%
+    % load letterspace pkg
+    \IfFileExists{letterspace.sty}{%
+      \@tufte@letterspacing@letterspace
+    }{}%
+  }{}%
+  % load soul pkg
+  \@ifpackageloaded{letterspace}{}{%
+    \IfFileExists{soul.sty}{%
+      \@tufte@letterspacing@soul
+    }{%
+      \@tufte@warning@noline{Couldn't locate `soul' package}%
+    }% soul not installed... giving up.
+  }%
+}{}
+
+%\ifthenelse{\boolean{@tufte@letterspace}}{%
+  %\ifthenelse{\boolean{pdf}}{%
+    %\ifthenelse{\NOT\boolean{@tufte@letterspace@pkg@prereqs}}{%
+      %% pdfLaTeX version is too old or not using pdfLaTeX
+      %\ifthenelse{\boolean{@tufte@xetex}}{%
+        %% TODO use xetex letterspacing
+        %\@tufte@debug@info@noline{XeTeX detected. Reverting to `soul' package for letterspacing}%
+        %\@tufte@loadsoul%
+      %}{%
+        %% use `soul' package for letterspacing
+        %\@tufte@debug@info@noline{Old version of pdfTeX detected. Reverting to `soul' package for letterspacing}%
+        %\@tufte@loadsoul%
+      %}
+    %}{%
+      %\IfFileExists{letterspace.sty}{%
+        %\@tufte@debug@info@noline{Modern version of pdfTeX detected. Using `letterspace' package}
+        %\RequirePackage{letterspace}
+        %% Set up letterspacing (using microtype package) -- requires pdfTeX v1.40+
+        %\renewcommand{\allcapsspacing}[1]{\textls[200]{##1}}
+        %\renewcommand{\smallcapsspacing}[1]{\textls[50]{##1}}
+        %\renewcommand{\allcaps}[1]{\textls[200]{\MakeTextUppercase{##1}}}
+        %\renewcommand{\smallcaps}[1]{\smallcapsspacing{\MakeTextLowercase{##1}}}
+        %\renewcommand{\textsc}[1]{\smallcapsspacing{\textsmallcaps{##1}}}
+      %}{% microtype failed, check for soul
+        %\@tufte@debug@info@noline{Modern version of pdfTeX detected, but `letterspace' package not installed.  Reverting to  `soul' package for letterspacing}
+        %\@tufte@loadsoul
+      %}%
+    %}%
+  %}{%
+    %\@tufte@debug@info@noline{Plain LaTeX detected. Using `soul' package for letterspacing}
+    %\@tufte@loadsoul
+  %}
+%}{%
+%% we're not to load letterspacing, so do nothing
+%}
+
+
+%%
+% An environment for paragraph-style section
+
+\providecommand\newthought[1]{%
+   \tuftebreak
+   \noindent\textsc{#1}%
+}
+
+%%
+% Redefine the display environments (quote, quotation, etc.)
+
+\renewenvironment{verse}
+               {\let\\\@centercr
+                \list{}{\itemsep      \z@
+                        \itemindent   -1pc%
+                        \listparindent\itemindent
+                        \rightmargin  \leftmargin
+                        \advance\leftmargin 1pc}%
+                \small%
+                \item\relax}
+               {\endlist}
+\renewenvironment{quotation}
+               {\list{}{\listparindent 1pc%
+                        \itemindent    \listparindent
+                        \rightmargin   \leftmargin
+                        \parsep        \z@ \@plus\p@}%
+                \small%
+                \item\relax\noindent\ignorespaces}
+               {\endlist}
+\renewenvironment{quote}
+               {\list{}{\rightmargin\leftmargin}%
+                \small%
+                \item\relax}
+               {\endlist}
+
+%%
+% Italicize description run-in headings (instead of the default bold)
+
+\renewcommand*\descriptionlabel[1]{\hspace\labelsep\normalfont\em #1}
+
+
+%%
+% Used for doublespacing, and other linespacing
+
+\RequirePackage{setspace}
+
+%%
+% Color
+\RequirePackage[dvipsnames,svgnames]{xcolor}% load before bidi
+
+%%
+% Load the bidi package if instructed to do so.  This package must be loaded
+% prior to our redefining the \footnote and \cite commands.
+
+\ifthenelse{\boolean{@tufte@loadbidi}}{%
+  \AtBeginDocument{%
+    \RequirePackage{bidi}
+    \@tufte@pkghook@post@bidi%
+  }%
+}{}
+
+
+%%
+% A function that removes leading and trailing spaces from the supplied macro.
+% Based on code written by Michael Downes (See ``Around the Bend'', #15.)
+% Executing \@tufte@trim@spaces\xyzzy will result in the contents of \xyzzy
+% being trimmed of leading and trailing white space.
+
+\catcode`\Q=3
+\def\@tufte@trim@spaces#1{%
+  % Use grouping to emulate a multi-token afterassignment queue
+  \begingroup%
+  % Put `\toks 0 {' into the afterassignment queue
+  \aftergroup\toks\aftergroup0\aftergroup{% 
+  % Apply \trimb to the replacement text of #1, adding a leading
+  % \noexpand to prevent brace stripping and to serve another purpose
+  % later.
+  \expandafter\@tufte@trim@b\expandafter\noexpand#1Q Q}%
+  % Transfer the trimmed text back into #1.
+  \edef#1{\the\toks0}%
+}
+
+% \trimb removes a trailing space if present, then calls \@tufte@trim@c to
+% clean up any leftover bizarre Qs, and trim a leading space. In
+% order for \trimc to work properly we need to put back a Q first.
+\def\@tufte@trim@b#1 Q{\@tufte@trim@c#1Q}
+
+% Execute \vfuzz assignment to remove leading space; the \noexpand
+% will now prevent unwanted expansion of a macro or other expandable
+% token at the beginning of the trimmed text. The \endgroup will feed
+% in the \aftergroup tokens after the \vfuzz assignment is completed.
+\def\@tufte@trim@c#1Q#2{\afterassignment\endgroup \vfuzz\the\vfuzz#1}
+\catcode`\Q=11
+
+%%
+% Citations should go in the margin as sidenotes
+
+\ifthenelse{\boolean{@tufte@loadnatbib}}{%
+  \RequirePackage{natbib}%
+  \RequirePackage{bibentry}% allows bibitems to be typeset outside thebibliography environment
+  % Redefine the \BR@b@bibitem command to fix a bug with bibentry+chicago style
+  \renewcommand\BR@b@bibitem[2][]{%
+    \ifthenelse{\isempty{#1}}%
+      {\BR@bibitem{#2}}%
+      {\BR@bibitem[#1]{#2}}%
+    \BR@c@bibitem{#2}%
+  }%
+  %\nobibliography*% pre-loads the bibliography keys
+  \providecommand{\doi}[1]{\textsc{doi:} #1}% pre-defining this so it may be used before the \bibliography command it issued
+}{}
+
+%%
+% Normal \cite behavior
+\newcounter{@tufte@num@bibkeys}%
+\newcommand{\@tufte@normal@cite}[2][0pt]{%
+  % Snag the last bibentry in the list for later comparison
+  \let\@temp@last@bibkey\@empty%
+  \@for\@temp@bibkey:=#2\do{\let\@temp@last@bibkey\@temp@bibkey}%
+  \sidenote[][#1]{%
+    % Loop through all the bibentries, separating them with semicolons and spaces
+    \normalsize\normalfont\@tufte@citation@font%
+    \setcounter{@tufte@num@bibkeys}{0}%
+    \@for\@temp@bibkeyx:=#2\do{%
+      \ifthenelse{\equal{\@temp@last@bibkey}{\@temp@bibkeyx}}%
+        {\ifthenelse{\equal{\value{@tufte@num@bibkeys}}{0}}{}{and\ }%
+         \@tufte@trim@spaces\@temp@bibkeyx% trim spaces around bibkey
+         \bibentry{\@temp@bibkeyx}}%
+        {\@tufte@trim@spaces\@temp@bibkeyx% trim spaces around bibkey
+         \bibentry{\@temp@bibkeyx};\ }%
+      \stepcounter{@tufte@num@bibkeys}%
+    }%
+  }%
+}
+
+
+%%
+% Macros for holding the list of cite keys until after the \sidenote
+
+\gdef\@tufte@citations{}% list of cite keys
+\newcommand\@tufte@add@citation[1]{\relax% adds a new bibkey to the list of cite keys
+  \ifx\@tufte@citations\@empty\else
+    \g@addto@macro\@tufte@citations{,}% separate by commas
+  \fi
+  \g@addto@macro\@tufte@citations{#1}
+}
+
+\newcommand{\@tufte@print@citations}[1][0pt]{% puts the citations in a margin note
+  % Snag the last bibentry in the list for later comparison
+  \let\@temp@last@bibkey\@empty%
+  \@for\@temp@bibkey:=\@tufte@citations\do{\let\@temp@last@bibkey\@temp@bibkey}%
+  \marginpar{%
+    \hbox{}\vspace*{#1}%
+    \@tufte@citation@font%
+    \@tufte@citation@justification%
+    \@tufte@margin@par% use parindent and parskip settings for marginal text
+    \vspace*{-1\baselineskip}%
+    % Loop through all the bibentries, separating them with semicolons and spaces
+    \setcounter{@tufte@num@bibkeys}{0}%
+    \@for\@temp@bibkeyx:=\@tufte@citations\do{%
+      \ifthenelse{\equal{\@temp@last@bibkey}{\@temp@bibkeyx}}%
+        {\ifthenelse{\equal{\value{@tufte@num@bibkeys}}{0}}{}{and\ }%
+         \@tufte@trim@spaces\@temp@bibkeyx% trim spaces around bibkey
+         \bibentry{\@temp@bibkeyx}}%
+        {\@tufte@trim@spaces\@temp@bibkeyx% trim spaces around bibkey
+         \bibentry{\@temp@bibkeyx};\ }%
+      \stepcounter{@tufte@num@bibkeys}%
+    }%
+  }%
+}
+
+%%
+% \cite behavior when executed within a sidenote
+
+\newcommand{\@tufte@sidenote@citations}{}% contains list of \cites in sidenote
+\newcommand{\@tufte@infootnote@cite}[1]{%
+  \@tufte@add@citation{#1}
+}
+
+%%
+% Set the default \cite style.  This is set and reset by the \sidenote command.
+
+\ifthenelse{\boolean{@tufte@loadnatbib}}{%
+  \let\cite\@tufte@normal@cite
+}{}
+
+%%
+% Transform existing \footnotes into \sidenotes
+% Sidenote: ``Where God meant footnotes to go.'' ---Tufte
+
+\RequirePackage{optparams}% for our new sidenote commands -- provides multiple optional arguments for commands
+
+\providecommand{\footnotelayout}{\@tufte@sidenote@font\@tufte@sidenote@justification}
+\renewcommand{\footnotelayout}{\@tufte@sidenote@font\@tufte@sidenote@justification}
+
+% Override footmisc's definition to set the sidenote marks (numbers) inside the
+% sidenote's text block.
+\long\def\@makefntext#1{\@textsuperscript{\@tufte@sidenote@font\tiny\@thefnmark}\,\footnotelayout#1}
+
+% Set the in-text footnote mark in the same typeface as the body text itself.
+\def\@makefnmark{\hbox{\@textsuperscript{\normalfont\footnotesize\@thefnmark}}}
+
+\providecommand*{\multiplefootnotemarker}{3sp}
+\providecommand*{\multfootsep}{,}
+
+\renewcommand{\@footnotemark}{%
+  \leavevmode%
+  \ifhmode%
+    \edef\@x@sf{\the\spacefactor}%
+    \@tufte@check@multiple@sidenotes%
+    \nobreak%
+  \fi%
+  \@makefnmark%
+  \ifhmode\spacefactor\@x@sf\fi%
+  \relax%
+}
+
+\newcommand{\@tufte@check@multiple@sidenotes}{%
+  \ifdim\lastkern=\multiplefootnotemarker\relax%
+    \edef\@x@sf{\the\spacefactor}%
+    \unkern%
+    \textsuperscript{\multfootsep}%
+    \spacefactor\@x@sf\relax%
+  \fi
+}
+
+\renewcommand\@footnotetext[2][0pt]{%
+  \marginpar{%
+    \hbox{}\vspace*{#1}%
+    \def\baselinestretch {\setspace@singlespace}%
+    \reset@font\footnotesize%
+    \@tufte@margin@par% use parindent and parskip settings for marginal text
+    \vspace*{-1\baselineskip}\noindent%
+    \protected@edef\@currentlabel{%
+       \csname p@footnote\endcsname\@thefnmark%
+    }%
+    \color@begingroup%
+       \@makefntext{%
+         \ignorespaces#2%
+       }%
+    \color@endgroup%
+  }%
+}%
+
+% Ensure this is run after the bidi package has been loaded
+\def\@tufte@pkghook@post@bidi{}%
+\g@addto@macro{\@tufte@pkghook@post@bidi}{%
+  \renewcommand\@footnotetext[2][0pt]{%
+    \marginpar{%
+      \hbox{}\vspace*{#1}%
+      \def\baselinestretch {\setspace@singlespace}%
+      \if@rl@footnote\@rltrue\else\@rlfalse\fi%
+      \reset@font\footnotesize%
+      \@tufte@margin@par% use parindent and parskip settings for marginal text
+      \vspace*{-1\baselineskip}\noindent%
+      \protected@edef\@currentlabel{%
+         \csname p@footnote\endcsname\@thefnmark%
+      }%
+      \color@begingroup%
+         \@makefntext{%
+           \ignorespaces#2%
+         }%
+      \color@endgroup%
+    }%
+  }%
+}%
+
+%
+% Define \sidenote command.  Can handle \cite.
+
+\newlength{\@tufte@sidenote@vertical@offset}
+\setlength{\@tufte@sidenote@vertical@offset}{0pt}
+
+% #1 = footnote num, #2 = vertical offset, #3 = footnote text
+\long\def\@tufte@sidenote[#1][#2]#3{%
+  \ifthenelse{\boolean{@tufte@loadnatbib}}{%
+    \let\cite\@tufte@infootnote@cite%   use the in-sidenote \cite command
+  }{}%
+  \gdef\@tufte@citations{}%           clear out any old citations
+  \ifthenelse{\NOT\isempty{#2}}{%
+    \gsetlength{\@tufte@sidenote@vertical@offset}{#2}%
+  }{%
+    \gsetlength{\@tufte@sidenote@vertical@offset}{0pt}%
+  }%
+  \ifthenelse{\isempty{#1}}{%
+    % no specific footnote number provided
+    \stepcounter\@mpfn%
+    \protected@xdef\@thefnmark{\thempfn}%
+    \@footnotemark\@footnotetext[\@tufte@sidenote@vertical@offset]{#3}%
+  }{%
+    % specific footnote number provided
+    \begingroup%
+      \csname c@\@mpfn\endcsname #1\relax%
+      \unrestored@protected@xdef\@thefnmark{\thempfn}%
+    \endgroup%
+    \@footnotemark\@footnotetext[\@tufte@sidenote@vertical@offset]{#3}%
+  }%
+  \@tufte@print@citations%            print any citations
+  \ifthenelse{\boolean{@tufte@loadnatbib}}{%
+    \let\cite\@tufte@normal@cite%       go back to using normal in-text \cite command
+  }{}%
+  \unskip\ignorespaces%               remove extra white space
+  \kern-\multiplefootnotemarker%      remove \kern left behind by sidenote
+  \kern\multiplefootnotemarker\relax% add new \kern here to replace the one we yanked
+}
+
+\newcommand{\sidenote}{\optparams{\@tufte@sidenote}{[][0pt]}}
+\renewcommand{\footnote}{\optparams{\@tufte@sidenote}{[][0pt]}}
+
+%%
+% Sidenote without the footnote mark
+
+\newcommand\marginnote[2][0pt]{%
+  \ifthenelse{\boolean{@tufte@loadnatbib}}{%
+    \let\cite\@tufte@infootnote@cite%   use the in-sidenote \cite command
+  }{}%
+  \gdef\@tufte@citations{}%           clear out any old citations
+  \marginpar{\hbox{}\vspace*{#1}\@tufte@marginnote@font\@tufte@marginnote@justification\@tufte@margin@par\vspace*{-1\baselineskip}\noindent #2}%
+  \@tufte@print@citations%            print any citations
+  \ifthenelse{\boolean{@tufte@loadnatbib}}{%
+    \let\cite\@tufte@normal@cite%       go back to using normal in-text \cite command
+  }{}%
+}
+
+
+%%
+% The placeins package provides the \FloatBarrier command.  This forces
+% LaTeX to place all of the floats before proceeding.  We'll use this to
+% keep the float (figure and table) numbers in sequence.
+\RequirePackage{placeins}
+
+%%
+% Margin float environment
+
+\newsavebox{\@tufte@margin@floatbox}
+\newenvironment{@tufte@margin@float}[2][-1.2ex]%
+  {\FloatBarrier% process all floats before this point so the figure/table numbers stay in order.
+  \begin{lrbox}{\@tufte@margin@floatbox}%
+  \begin{minipage}{\marginparwidth}%
+    \@tufte@caption@font%
+    \def\@captype{#2}%
+    \hbox{}\vspace*{#1}%
+    \@tufte@caption@justification%
+    \@tufte@margin@par%
+    \noindent%
+  }
+  {\end{minipage}%
+  \end{lrbox}%
+  \marginpar{\usebox{\@tufte@margin@floatbox}}%
+  }
+
+
+%%
+% Margin figure environment
+
+\newenvironment{marginfigure}[1][-1.2ex]%
+  {\begin{@tufte@margin@float}[#1]{figure}}
+  {\end{@tufte@margin@float}}
+
+
+%%
+% Margin table environment
+
+\newenvironment{margintable}[1][-1.2ex]%
+  {\begin{@tufte@margin@float}[#1]{table}}
+  {\end{@tufte@margin@float}}
+
+
+%%
+% Auto-detects the proper text alignment based on the various class options
+
+\newcommand*{\@tufte@justification@autodetect}{%
+  \ifthenelse{\boolean{@tufte@justified}}%
+    {\justifying}%
+    {\RaggedRight}%
+}
+
+%%
+% Forces the outer edge of the caption to be set ragged.  
+% Therefore, on verso pages it's ragged left, and on recto pages it's ragged right.
+
+\newcommand*{\@tufte@justification@caption@outer}{%
+  \ifthenelse{\boolean{@tufte@float@recto}}%
+    {\RaggedRight}%
+    {\RaggedLeft}%
+}
+
+\newcommand*{\@tufte@justification@outer}{%
+  \@tufte@checkoddpage%
+  \ifthenelse{\boolean{@tufte@odd@page}}%
+    {\RaggedRight}%
+    {\RaggedLeft}%
+}
+
+
+
+%%
+% A collection of macros to be used with the new Tufte-style float environments.
+% \setfloatalignment forces the caption placement to be treated as top, bottom, etc.
+% \forcerectofloat forces the float to be treated as if it were appearing on a recto page.
+% \forceversofloat does the same, but for verso pages.
+
+\newcommand{\@tufte@float@debug@info}{}% contains debug info generated as the float is processed
+\newcommand{\@tufte@float@debug}[1]{% adds debug info to the queue for output
+  \ifthenelse{\equal{\@tufte@float@debug@info}{}}%
+    {\def\@tufte@float@debug@info{#1}}%
+    {\g@addto@macro\@tufte@float@debug@info{\MessageBreak#1}}%
+}
+
+\newcommand{\floatalignment}{x}% holds the current float alignment (t, b, h, p)
+\newcommand{\setfloatalignment}[1]{\global\def\floatalignment{#1}\@tufte@float@debug{Forcing position: [#1]}}% manually sets the float alignment
+\newboolean{@tufte@float@recto}
+\newcommand{\forcerectofloat}{\gsetboolean{@tufte@float@recto}{true}\@tufte@float@debug{Forcing page: [recto]}}
+\newcommand{\forceversofloat}{\gsetboolean{@tufte@float@recto}{false}\@tufte@float@debug{Forcing page: [verso]}}
+
+% Boxes to temporarily store our float and caption
+\newsavebox{\@tufte@figure@box}
+\newsavebox{\@tufte@caption@box}
+
+% Save original LaTeX float environment
+\let\@tufte@orig@float\@float
+\let\@tufte@orig@endfloat\end@float
+
+% New length for tweaking float captions
+\newlength{\@tufte@caption@vertical@offset}
+\setlength{\@tufte@caption@vertical@offset}{0pt}
+
+% Store the caption and label contents
+\newcommand{\@tufte@stored@shortcaption}{}
+\newcommand{\@tufte@stored@caption}{}
+\newcommand{\@tufte@stored@label}{}
+
+\long\def\@tufte@caption[#1][#2]#3{%
+  \ifthenelse{\isempty{#1}}%
+    {\gdef\@tufte@stored@shortcaption{#3}}%
+    {\gdef\@tufte@stored@shortcaption{#1}}%
+  \gsetlength{\@tufte@caption@vertical@offset}{-#2}% we want a positive offset to lower captions
+  \gdef\@tufte@stored@caption{#3}%
+}
+
+\newcommand{\@tufte@label}[1]{%
+  \gdef\@tufte@stored@label{#1}%
+}
+
+\newcommand{\@tufte@fps}{}
+
+\newboolean{@tufte@float@star}
+\newlength{\@tufte@float@contents@width}
+
+%%
+% Define a float environment to place the captions in the margin space
+
+\newenvironment{@tufte@float}[3][htbp]%
+  {% begin @tufte@float
+    % Should this float be full-width or just text-width?
+    \ifthenelse{\equal{#3}{star}}%
+      {\gsetboolean{@tufte@float@star}{true}}%
+      {\gsetboolean{@tufte@float@star}{false}}%
+    % Check page side (recto/verso) and store detected value -- can be overriden in environment contents
+    \@tufte@checkoddpage%
+    \ifthenelse{\boolean{@tufte@odd@page}}%
+      {\gsetboolean{@tufte@float@recto}{true}\@tufte@float@debug{Detected page: [recto/odd]}}%
+      {\gsetboolean{@tufte@float@recto}{false}\@tufte@float@debug{Detected page: [verso/even]}}%
+    % If the float placement specifier is 'b' and only 'b', then bottom-align the mini-pages, otherwise top-align them.
+    \renewcommand{\@tufte@fps}{#1}%
+    \@tufte@float@debug{Allowed positions: [#1]}%
+    \ifthenelse{\equal{#1}{b}\OR\equal{#1}{B}}%
+      {\renewcommand{\floatalignment}{b}\@tufte@float@debug{Presumed position: [bottom]}}%
+      {\renewcommand{\floatalignment}{t}\@tufte@float@debug{Presumed position: [top]}}%
+    % Capture the contents of the \caption and \label commands to use later
+    \global\let\@tufte@orig@caption\caption%
+    \global\let\@tufte@orig@label\label%
+    \renewcommand{\caption}{\optparams{\@tufte@caption}{[][0pt]}}%
+    \renewcommand{\label}[1]{\@tufte@label{##1}}%
+    % Handle subfigure package compatibility
+    \ifthenelse{\boolean{@tufte@packages@subfigure}}{%
+      % don't move the label while inside a \subfigure or \subtable command
+      \global\let\label\@tufte@orig@label%
+    }{}% subfigure package is not loaded
+    \@tufte@orig@float{#2}[#1]%
+    \ifthenelse{\boolean{@tufte@float@star}}%
+      {\setlength{\@tufte@float@contents@width}{\@tufte@fullwidth}}%
+      {\setlength{\@tufte@float@contents@width}{\textwidth}}%
+    \begin{lrbox}{\@tufte@figure@box}%
+      \begin{minipage}[\floatalignment]{\@tufte@float@contents@width}\hbox{}%
+  }{% end @tufte@float
+      \par\hbox{}\vspace{-\baselineskip}\ifthenelse{\prevdepth>0}{\vspace{-\prevdepth}}{}% align baselines of boxes
+      \end{minipage}%
+    \end{lrbox}%
+    % build the caption box
+    \begin{lrbox}{\@tufte@caption@box}%
+      \begin{minipage}[\floatalignment]{\marginparwidth}\hbox{}%
+        \ifthenelse{\NOT\equal{\@tufte@stored@caption}{}}{\@tufte@orig@caption[\@tufte@stored@shortcaption]{\@tufte@stored@caption}}{}%
+        \ifthenelse{\NOT\equal{\@tufte@stored@label}{}}{\@tufte@orig@label{\@tufte@stored@label}}{}%
+        \par\vspace{-\prevdepth}%% TODO: DOUBLE-CHECK FOR SAFETY
+      \end{minipage}%
+    \end{lrbox}%
+    % now typeset the stored boxes
+    \begin{fullwidth}%
+      \begin{minipage}[\floatalignment]{\linewidth}%
+        \ifthenelse{\boolean{@tufte@float@star}}%
+          {\@tufte@float@fullwidth[\@tufte@caption@vertical@offset]{\@tufte@figure@box}{\@tufte@caption@box}}%
+          {\@tufte@float@textwidth[\@tufte@caption@vertical@offset]{\@tufte@figure@box}{\@tufte@caption@box}}%
+      \end{minipage}%
+    \end{fullwidth}%
+    \@tufte@orig@endfloat% end original LaTeX float environment
+    % output debug info
+    \ifthenelse{\boolean{@tufte@debug}}{%
+      \typeout{^^J^^J----------- Tufte-LaTeX float information ----------}%
+      \ifthenelse{\equal{\@tufte@stored@label}{}}%
+        {\typeout{Warning: Float unlabeled!}}%
+        {\typeout{Float label: [\@tufte@stored@label]}}%
+      \typeout{Page number: [\thepage]}%
+      \def\MessageBreak{^^J}%
+      \typeout{\@tufte@float@debug@info}%
+      \ifthenelse{\boolean{@tufte@symmetric}}%
+        {\typeout{Symmetric: [true]}}%
+        {\typeout{Symmetric: [false]}}%
+      \typeout{----------------------------------------------------^^J^^J}%
+    }{}%
+    % reset commands and temp boxes and captions
+    \gdef\@tufte@float@debug@info{}%
+    \let\caption\@tufte@orig@caption%
+    \let\label\@tufte@orig@label%
+    \begin{lrbox}{\@tufte@figure@box}\hbox{}\end{lrbox}%
+    \begin{lrbox}{\@tufte@caption@box}\hbox{}\end{lrbox}%
+    \gdef\@tufte@stored@shortcaption{}%
+    \gdef\@tufte@stored@caption{}%
+    \gdef\@tufte@stored@label{}%
+    \gsetlength{\@tufte@caption@vertical@offset}{0pt}% reset caption offset
+  }
+
+\newcommand{\@tufte@float@textwidth}[3][0pt]{%
+  \ifthenelse{\NOT\boolean{@tufte@symmetric}\OR\boolean{@tufte@float@recto}}{%
+    % asymmetric or page is odd, so caption is on the right
+    \hbox{%
+      \usebox{#2}%
+      \hspace{\marginparsep}%
+      \smash{\raisebox{#1}{\usebox{#3}}}%
+    }%
+    \@tufte@float@debug{Caption position: [right]}%
+  }{% symmetric pages and page is even, so caption is on the left
+    \hbox{%
+      \smash{\raisebox{#1}{\usebox{#3}}}%
+      \hspace{\marginparsep}%
+      \usebox{#2}%
+    }%
+    \@tufte@float@debug{Caption position: [left]}%
+  }%
+}
+
+\newcommand{\@tufte@float@fullwidth}[3][0pt]{%
+  \ifthenelse{\equal{\floatalignment}{b}}%
+    {% place caption above figure
+      \ifthenelse{\NOT\boolean{@tufte@symmetric}\OR\boolean{@tufte@float@recto}}%
+        {\hfill\smash{\raisebox{#1}{\usebox{#3}}}\par\usebox{#2}\@tufte@float@debug{Caption position: [above right]}}% caption on the right
+        {\smash{\raisebox{#1}{\usebox{#3}}}\hfill\par\usebox{#2}\@tufte@float@debug{Caption position: [above left]}}% caption on the left
+    }{% place caption below figure
+      \ifthenelse{\NOT\boolean{@tufte@symmetric}\OR\boolean{@tufte@float@recto}}%
+        {\usebox{#2}\par\hfill\smash{\raisebox{#1}{\usebox{#3}}}\@tufte@float@debug{Caption position: [below right]}}% caption on the right
+        {\usebox{#2}\par\smash{\raisebox{#1}{\usebox{#3}}}\hfill\@tufte@float@debug{Caption position: [below left]}}% caption on the left
+    }%
+}
+
+
+%%
+% Redefine the figure environment to place the captions in the margin space
+
+\renewenvironment{figure}[1][htbp]%
+  {\ifvmode\else\unskip\fi\begin{@tufte@float}[#1]{figure}{}}
+  {\end{@tufte@float}}
+
+
+%%
+% Redefine the table environment to place the captions in the margin space
+
+\renewenvironment{table}[1][htbp]
+  {\ifvmode\else\unskip\fi\begin{@tufte@float}[#1]{table}{}}
+  {\end{@tufte@float}}
+
+
+%%
+% Full-width figure
+
+\renewenvironment{figure*}[1][htbp]%
+  {\ifvmode\else\unskip\fi\begin{@tufte@float}[#1]{figure}{star}}
+  {\end{@tufte@float}}
+
+
+%%
+% Full-width table
+
+\renewenvironment{table*}[1][htbp]%
+  {\ifvmode\else\unskip\fi\begin{@tufte@float}[#1]{table}{star}}
+  {\end{@tufte@float}}
+
+
+%%
+% Full-page-width area
+
+\newenvironment{fullwidth}
+  {\ifthenelse{\boolean{@tufte@symmetric}}%
+     {\ifthenelse{\boolean{@tufte@changepage}}{\begin{adjustwidth*}{}{-\@tufte@overhang}}{\begin{adjustwidth}[]{}{-\@tufte@overhang}}}%
+     {\begin{adjustwidth}{}{-\@tufte@overhang}}%
+  }%
+  {\ifthenelse{\boolean{@tufte@symmetric}}%
+    {\ifthenelse{\boolean{@tufte@changepage}}{\end{adjustwidth*}}{\end{adjustwidth}}}%
+    {\end{adjustwidth}}%
+  }
+
+%%
+% Format the captions in a style similar to the sidenotes
+
+\long\def\@caption#1[#2]#3{%
+  \par%
+  \addcontentsline{\csname ext@#1\endcsname}{#1}%
+    {\protect\numberline{\csname the#1\endcsname}{\ignorespaces #2}}%
+  \begingroup%
+    \@parboxrestore%
+    \if@minipage%
+      \@setminipage%
+    \fi%
+    \@tufte@caption@font\@tufte@caption@justification%
+    \noindent\csname fnum@#1\endcsname: \ignorespaces#3\par%
+    %\@makecaption{\csname fnum@#1\endcsname}{\ignorespaces #3}\par
+  \endgroup}
+
+%%
+% If we're NOT using XeLaTeX and the `nofonts' class option was NOT provided,
+% we should load the Palatino, Helvetica, and Bera Mono fonts (if they are
+% installed.)
+
+\ifthenelse{\boolean{@tufte@loadfonts}\AND\NOT\boolean{@tufte@xetex}\AND\NOT\boolean{@tufte@luatex}}{%
+  \IfFileExists{mathpazo.sty}{\RequirePackage[osf,sc]{mathpazo}}{}
+  \IfFileExists{helvet.sty}{\RequirePackage[scaled=0.90]{helvet}}{}
+  \IfFileExists{beramono.sty}{\RequirePackage[scaled=0.85]{beramono}}{}
+  \RequirePackage[T1]{fontenc}
+  \RequirePackage{textcomp}
+}{}
+
+
+%%
+% Turns newlines into spaces.  Based on code from the `titlesec' package.
+
+\DeclareRobustCommand{\@tufte@newlinetospace}{%
+  \@ifstar{\@tufte@newlinetospace@i}{\@tufte@newlinetospace@i}%
+}
+
+\def\@tufte@newlinetospace@i{%
+  \ifdim\lastskip>\z@\else\space\fi
+  \ignorespaces%
+}
+
+\DeclareRobustCommand{\newlinetospace}[1]{%
+  \let\@tufte@orig@cr\\% save the original meaning of \\
+  \def\\{\@tufte@newlinetospace}% turn \\ and \\* into \space
+  \let\newline\\% turn \newline into \space
+  #1%
+  \let\\\@tufte@orig@cr% revert to original meaning of \\
+}
+
+
+%%
+% Sets up the running heads and folios.
+
+\RequirePackage{fancyhdr}
+
+% Set the default page style to 'fancy'
+\pagestyle{fancy}
+
+% Set the header/footer width to be the body text block plus the margin
+% note area.
+\AtBeginDocument{%
+  \ifthenelse{\boolean{@tufte@symmetric}}
+    {\fancyhfoffset[LE,RO]{\@tufte@overhang}}
+    {\fancyhfoffset[RE,RO]{\@tufte@overhang}}
+}
+
+% The running heads/feet don't have rules
+\renewcommand{\headrulewidth}{0pt}
+\renewcommand{\footrulewidth}{0pt}
+
+% The 'fancy' page style is the default style for all pages.
+\fancyhf{} % clear header and footer fields
+\ifthenelse{\boolean{@tufte@twoside}}
+  {\fancyhead[LE]{\thepage\quad\smallcaps{\newlinetospace{\plainauthor}}}%
+    \fancyhead[RO]{\smallcaps{\newlinetospace{\plaintitle}}\quad\thepage}}
+  {\fancyhead[RE,RO]{\smallcaps{\newlinetospace{\plaintitle}}\quad\thepage}}
+
+
+% The `plain' page style is used on chapter opening pages.
+% In Tufte's /Beautiful Evidence/ he never puts page numbers at the
+% bottom of pages -- the folios are unexpressed.
+\fancypagestyle{plain}{
+  \fancyhf{} % clear header and footer fields
+  % Uncomment the following five lines of code if you want the opening page
+  % of the chapter to express the folio in the lower outside corner.
+  %\ifthenelse{\boolean{@tufte@twoside}}
+  %  {\fancyfoot[LE,RO]{\thepage}}
+  %  {\fancyfoot[RE,RO]{\thepage}}
+}
+
+% The `empty' page style suppresses all headers and footers.
+% It's used on title pages and `intentionally blank' pages.
+\fancypagestyle{empty}{
+  \fancyhf{} % clear header and footer fields
+}
+
+
+%%
+% Set raggedright and paragraph indentation for document
+
+\AtBeginDocument{\@tufte@justification}
+
+
+%%
+% Prints the list of class options and their states.
+
+\newcommand{\typeoutbool}[2]{%
+  \ifthenelse{\boolean{#2}}
+    {\typeout{\space\space#1: true}}
+    {\typeout{\space\space#1: false}}
+}
+
+\newcommand{\typeoutstr}[2]{%
+  \typeout{\space\space#1: #2}
+}
+
+\newcommand{\PrintTufteSettings}{%
+  \typeout{-------------------- Tufte-LaTeX settings ----------}
+  \typeout{Class: \@tufte@pkgname}
+  \typeout{}
+  \typeout{Class options:}
+  \typeoutbool{a4paper}{@tufte@afourpaper}
+  \typeoutbool{b5paper}{@tufte@bfivepaper}
+  \typeoutbool{load fonts}{@tufte@loadfonts}
+  \typeoutbool{fully-justified}{@tufte@justified}
+  \typeoutbool{letterspacing}{@tufte@letterspace}
+  \typeoutbool{sans-serif sidenotes}{@tufte@sfsidenotes}
+  \typeoutbool{symmetric margins}{@tufte@symmetric}
+  \typeoutbool{titlepage}{@tufte@titlepage}
+  \typeoutbool{twoside}{@tufte@twoside}
+  \typeoutbool{debug}{@tufte@debug}
+  \typeout{}
+  \typeout{Internal variables:}
+  \typeoutbool{[twoside]}{@twoside}
+  \typeoutbool{pdflatex}{@tufte@pdf}
+  \typeoutbool{xelatex}{@tufte@xetex}
+  \typeout{----------------------------------------------------}
+}
+
+%%
+% Amount of space to skip before \newthought or after title block
+
+\newskip\tufteskipamount
+\tufteskipamount=1.0\baselineskip plus 0.5ex minus 0.2ex
+
+\newcommand{\tuftebreak}{\par\ifdim\lastskip<\tufteskipamount
+  \removelastskip\penalty-100\tufteskip\fi}
+
+\newcommand{\tufteskip}{\vspace\tufteskipamount}
+
+
+%%
+% Produces a full title page
+
+\newcommand{\maketitlepage}[0]{%
+  \cleardoublepage%
+  {%
+  \sffamily%
+  \begin{fullwidth}%
+  \fontsize{18}{20}\selectfont\par\noindent\textcolor{darkgray}{\allcaps{\thanklessauthor}}%
+  \vspace{11.5pc}%
+  \fontsize{36}{40}\selectfont\par\noindent\textcolor{darkgray}{\allcaps{\thanklesstitle}}%
+  \vfill%
+  \fontsize{14}{16}\selectfont\par\noindent\allcaps{\thanklesspublisher}%
+  \end{fullwidth}%
+  }
+  \thispagestyle{empty}%
+  \clearpage%
+}
+
+%%
+% Title block
+
+\renewcommand{\maketitle}{%
+  \newpage
+  \global\@topnum\z@% prevent floats from being placed at the top of the page
+  \begingroup
+    \setlength{\parindent}{0pt}%
+    \setlength{\parskip}{4pt}%
+    \let\@@title\@empty
+    \let\@@author\@empty
+    \let\@@date\@empty
+    \ifthenelse{\boolean{@tufte@sfsidenotes}}{%
+      \gdef\@@title{\sffamily\LARGE\allcaps{\@title}\par}%
+      \gdef\@@author{\sffamily\Large\allcaps{\@author}\par}%
+      \gdef\@@date{\sffamily\Large\allcaps{\@date}\par}%
+    }{%
+      \gdef\@@title{\LARGE\itshape\@title\par}%
+      \gdef\@@author{\Large\itshape\@author\par}%
+      \gdef\@@date{\Large\itshape\@date\par}%
+    }%
+    \@@title
+    \@@author
+    \@@date
+  \endgroup
+  \thispagestyle{plain}% suppress the running head
+  \tuftebreak% add some space before the text begins
+  \@afterindentfalse\@afterheading% suppress indentation of the next paragraph
+}
+
+
+%%
+% Title page (if the `titlepage' option was passed to the tufte-handout
+% class.)
+
+\ifthenelse{\boolean{@tufte@titlepage}}
+  {\renewcommand{\maketitle}{\maketitlepage}}
+  {}
+
+%%
+% When \cleardoublepage is called, produce a blank (empty) page -- i.e.,
+% without headers and footers
+\def\cleardoublepage{\clearpage\if@twoside\ifodd\c@page\else
+  \hbox{}
+  %\vspace*{\fill}
+  %\begin{center}
+  %  This page intentionally contains only this sentence.
+  %\end{center}
+  %\vspace{\fill}
+  \thispagestyle{empty}
+  \newpage
+  \if@twocolumn\hbox{}\newpage\fi\fi\fi}
+
+%%
+% Make Tuftian-style section headings and TOC formatting
+
+\titleformat{\chapter}%
+  [display]% shape
+  {\relax\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\begin{fullwidth}}{}}% format applied to label+text
+  {\itshape\huge\thechapter}% label
+  {0pt}% horizontal separation between label and title body
+  {\huge\rmfamily\itshape}% before the title body
+  [\ifthenelse{\NOT\boolean{@tufte@symmetric}}{\end{fullwidth}}{}]% after the title body
+
+\titleformat{\section}%
+  [hang]% shape
+  {\normalfont\Large\itshape}% format applied to label+text
+  {\thesection}% label
+  {1em}% horizontal separation between label and title body
+  {}% before the title body
+  []% after the title body
+
+\titleformat{\subsection}%
+  [hang]% shape
+  {\normalfont\large\itshape}% format applied to label+text
+  {\thesubsection}% label
+  {1em}% horizontal separation between label and title body
+  {}% before the title body
+  []% after the title body
+
+\titleformat{\paragraph}%
+  [runin]% shape
+  {\normalfont\itshape}% format applied to label+text
+  {\theparagraph}% label
+  {1em}% horizontal separation between label and title body
+  {}% before the title body
+  []% after the title body
+
+\titlespacing*{\chapter}{0pt}{50pt}{40pt}
+\titlespacing*{\section}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}
+\titlespacing*{\subsection}{0pt}{3.25ex plus 1ex minus .2ex}{1.5ex plus.2ex}
+
+% Subsubsection and following section headings shouldn't be used.
+% See Bringhurst's _The Elements of Typography_, section 4.2.2.
+\renewcommand\subsubsection{%
+  \@tufte@error{\string\subsubsection is undefined by this class.
+    See Robert Bringhurst's _The Elements of 
+    Typographic Style_, section 4.2.2.
+    \string\subsubsection was used}
+    {From Bringhurst's _The Elements of Typographic Style_, section 4.2.2: Use as 
+    many levels of headings as you need, no more and no fewer.  Also see the many 
+    related threads on Ask E.T. at http://www.edwardtufte.com/.}
+}
+
+\renewcommand\subparagraph{%
+  \@tufte@error{\string\subparagraph is undefined by this class.%
+    See Robert Bringhurst's _The Elements of 
+    Typographic Style_, section 4.2.2.
+    \string\subparagraph was used}
+    {From Bringhurst's _The Elements of Typographic Style_, section 4.2.2: Use as 
+    many levels of headings as you need, no more and no fewer.  Also see the many 
+    related threads on Ask E.T. at http://www.edwardtufte.com/.}
+}
+
+
+% Formatting for main TOC (printed in front matter)
+% {section} [left] {above} {before w/label} {before w/o label} {filler + page} [after]
+\ifthenelse{\boolean{@tufte@toc}}{%
+  \titlecontents{part}% FIXME
+    [0em] % distance from left margin
+    {\vspace{1.5\baselineskip}\begin{fullwidth}\LARGE\rmfamily\itshape} % above (global formatting of entry)
+    {\contentslabel{2em}} % before w/label (label = ``II'')
+    {} % before w/o label
+    {\rmfamily\upshape\qquad\thecontentspage} % filler + page (leaders and page num)
+    [\end{fullwidth}] % after
+  \titlecontents{chapter}%
+    [0em] % distance from left margin
+    {\vspace{1.5\baselineskip}\begin{fullwidth}\LARGE\rmfamily\itshape} % above (global formatting of entry)
+    {\hspace*{0em}\contentslabel{2em}} % before w/label (label = ``2'')
+    {\hspace*{0em}} % before w/o label
+    {\rmfamily\upshape\qquad\thecontentspage} % filler + page (leaders and page num)
+    [\end{fullwidth}] % after
+  \titlecontents{section}% FIXME
+    [0em] % distance from left margin
+    {\vspace{0\baselineskip}\begin{fullwidth}\Large\rmfamily\itshape} % above (global formatting of entry)
+    {\hspace*{2em}\contentslabel{2em}} % before w/label (label = ``2.6'')
+    {\hspace*{2em}} % before w/o label
+    {\rmfamily\upshape\qquad\thecontentspage} % filler + page (leaders and page num)
+    [\end{fullwidth}] % after
+  \titlecontents{subsection}% FIXME
+    [0em] % distance from left margin
+    {\vspace{0\baselineskip}\begin{fullwidth}\large\rmfamily\itshape} % above (global formatting of entry)
+    {\hspace*{4em}\contentslabel{4em}} % before w/label (label = ``2.6.1'')
+    {\hspace*{4em}} % before w/o label
+    {\rmfamily\upshape\qquad\thecontentspage} % filler + page (leaders and page num)
+    [\end{fullwidth}] % after
+  \titlecontents{paragraph}% FIXME
+    [0em] % distance from left margin
+    {\vspace{0\baselineskip}\begin{fullwidth}\normalsize\rmfamily\itshape} % above (global formatting of entry)
+    {\hspace*{6em}\contentslabel{2em}} % before w/label (label = ``2.6.0.0.1'')
+    {\hspace*{6em}} % before w/o label
+    {\rmfamily\upshape\qquad\thecontentspage} % filler + page (leaders and page num)
+    [\end{fullwidth}] % after
+}{}
+
+%%
+% Format lists of figures/tables
+
+\renewcommand\listoffigures{%
+  \ifthenelse{\equal{\@tufte@class}{book}}%
+    {\chapter*{\listfigurename}}%
+    {\section*{\listfigurename}}%
+%  \begin{fullwidth}%
+    \@starttoc{lof}%
+%  \end{fullwidth}%
+}
+
+\renewcommand\listoftables{%
+  \ifthenelse{\equal{\@tufte@class}{book}}%
+    {\chapter*{\listtablename}}%
+    {\section*{\listtablename}}%
+%  \begin{fullwidth}%
+    \@starttoc{lot}%
+%  \end{fullwidth}%
+}
+
+\newcommand{\@tufte@lof@line}[2]{%
+  % #1 is the figure/table number and its caption text
+  % #2 is the page number on which the figure/table appears
+  \leftskip 0.0em
+  \rightskip 0em
+  \parfillskip 0em plus 1fil
+  \parindent 0.0em
+  \@afterindenttrue
+  \interlinepenalty\@M
+  \leavevmode
+  \@tempdima 2.0em
+  \advance\leftskip\@tempdima
+  \null\nobreak\hskip -\leftskip
+  {#1}\nobreak\qquad\nobreak#2%
+  \par%
+}
+
+\renewcommand*\l@figure{\@tufte@lof@line}
+\let\l@table\l@figure
+
+
+%%
+% A handy command to disable hyphenation for short bits of text.
+% Borrowed from Peter Wilson's `hyphenat' package.
+
+\AtBeginDocument{%
+  \@ifpackageloaded{hyphenat}{}{%
+    \newlanguage\langwohyphens% define a language without hyphenation rules
+    \providecommand{\nohyphens}[1]{{\language\langwohyphens #1}}% used for short bits of text
+    \providecommand{\nohyphenation}{\language\langwohyphens}% can be used inside environments for longer text
+  }%
+}
+
+%%
+% Redefine \bibsection to not mark the running heads.
+% (Code modified from natbib.sty.)
+
+\ifthenelse{\boolean{@tufte@loadnatbib}}{%
+  \@ifundefined{chapter}{%
+    \renewcommand\bibsection{\section*{\refname}}%
+  }{%
+    \@ifundefined{NAT@sectionbib}{%
+      \renewcommand\bibsection{\chapter{\bibname}}%
+    }{%
+      \renewcommand\bibsection{\section*{\bibname}}%
+    }%
+  }%
+}
+
+%%
+% An index environment to mimic Tufte's indexes
+
+\RequirePackage{multicol}
+\renewenvironment{theindex}{%
+  \ifthenelse{\equal{\@tufte@class}{book}}%
+    {\chapter{\indexname}}%
+    {\section*{\indexname}}%
+  \begin{fullwidth}%
+  \small%
+  \parskip0pt%
+  \parindent0pt%
+  \let\item\@idxitem%
+  \begin{multicols}{3}%
+}{%
+  \end{multicols}%
+  \end{fullwidth}%
+}
+\renewcommand\@idxitem{\par\hangindent 2em}
+\renewcommand\subitem{\par\hangindent 3em\hspace*{1em}}
+\renewcommand\subsubitem{\par\hangindent 4em\hspace*{2em}}
+\renewcommand\indexspace{\par\addvspace{1.0\baselineskip plus 0.5ex minus 0.2ex}\relax}%
+\newcommand{\lettergroup}[1]{}% swallow the letter heading in the index
+
+
+%%
+% A couple commands to increase the number of floats you can use at a time.
+
+\def\morefloats{% provides a total of 52 floats
+  \ifthenelse{\isundefined{\bx@S}}{%
+    \@tufte@debug@info@noline{Adding 34 more float slots.}
+    \newinsert\bx@S
+    \newinsert\bx@T
+    \newinsert\bx@U
+    \newinsert\bx@V
+    \newinsert\bx@W
+    \newinsert\bx@X
+    \newinsert\bx@Y
+    \newinsert\bx@Z
+    \newinsert\bx@a
+    \newinsert\bx@b
+    \newinsert\bx@c
+    \newinsert\bx@d
+    \newinsert\bx@e
+    \newinsert\bx@f
+    \newinsert\bx@g
+    \newinsert\bx@h
+    \newinsert\bx@i
+    \newinsert\bx@j
+    \newinsert\bx@k
+    \newinsert\bx@l
+    \newinsert\bx@m
+    \newinsert\bx@n
+    \newinsert\bx@o
+    \newinsert\bx@p
+    \newinsert\bx@q
+    \newinsert\bx@r
+    \newinsert\bx@s
+    \newinsert\bx@t
+    \newinsert\bx@u
+    \newinsert\bx@v
+    \newinsert\bx@w
+    \newinsert\bx@x
+    \newinsert\bx@y
+    \newinsert\bx@z
+    \gdef\@freelist{\@elt\bx@A\@elt\bx@B\@elt\bx@C\@elt\bx@D\@elt\bx@E
+                    \@elt\bx@F\@elt\bx@G\@elt\bx@H\@elt\bx@I\@elt\bx@J
+                    \@elt\bx@K\@elt\bx@L\@elt\bx@M\@elt\bx@N
+                    \@elt\bx@O\@elt\bx@P\@elt\bx@Q\@elt\bx@R
+                    \@elt\bx@S\@elt\bx@T\@elt\bx@U\@elt\bx@V
+                    \@elt\bx@W\@elt\bx@X\@elt\bx@Y\@elt\bx@Z
+                    \@elt\bx@a\@elt\bx@b\@elt\bx@c\@elt\bx@d\@elt\bx@e
+                    \@elt\bx@f\@elt\bx@g\@elt\bx@h\@elt\bx@i\@elt\bx@j
+                    \@elt\bx@k\@elt\bx@l\@elt\bx@m\@elt\bx@n
+                    \@elt\bx@o\@elt\bx@p\@elt\bx@q\@elt\bx@r
+                    \@elt\bx@s\@elt\bx@t\@elt\bx@u\@elt\bx@v
+                    \@elt\bx@w\@elt\bx@x\@elt\bx@y\@elt\bx@z}%
+  }{% we've already added another 34 floats, so we'll add 26 more, but that's it!
+    \ifthenelse{\isundefined{\bx@AA}}{%
+      \@tufte@debug@info@noline{Adding 26 more float slots.}
+      \newinsert\bx@AA
+      \newinsert\bx@BB
+      \newinsert\bx@CC
+      \newinsert\bx@DD
+      \newinsert\bx@EE
+      \newinsert\bx@FF
+      \newinsert\bx@GG
+      \newinsert\bx@HH
+      \newinsert\bx@II
+      \newinsert\bx@JJ
+      \newinsert\bx@KK
+      \newinsert\bx@LL
+      \newinsert\bx@MM
+      \newinsert\bx@NN
+      \newinsert\bx@OO
+      \newinsert\bx@PP
+      \newinsert\bx@QQ
+      \newinsert\bx@RR
+      \newinsert\bx@SS
+      \newinsert\bx@TT
+      \newinsert\bx@UU
+      \newinsert\bx@VV
+      \newinsert\bx@WW
+      \newinsert\bx@XX
+      \newinsert\bx@YY
+      \newinsert\bx@ZZ
+      \gdef\@freelist{\@elt\bx@A\@elt\bx@B\@elt\bx@C\@elt\bx@D\@elt\bx@E
+                      \@elt\bx@F\@elt\bx@G\@elt\bx@H\@elt\bx@I\@elt\bx@J
+                      \@elt\bx@K\@elt\bx@L\@elt\bx@M\@elt\bx@N
+                      \@elt\bx@O\@elt\bx@P\@elt\bx@Q\@elt\bx@R
+                      \@elt\bx@S\@elt\bx@T\@elt\bx@U\@elt\bx@V
+                      \@elt\bx@W\@elt\bx@X\@elt\bx@Y\@elt\bx@Z
+                      \@elt\bx@a\@elt\bx@b\@elt\bx@c\@elt\bx@d\@elt\bx@e
+                      \@elt\bx@f\@elt\bx@g\@elt\bx@h\@elt\bx@i\@elt\bx@j
+                      \@elt\bx@k\@elt\bx@l\@elt\bx@m\@elt\bx@n
+                      \@elt\bx@o\@elt\bx@p\@elt\bx@q\@elt\bx@r
+                      \@elt\bx@s\@elt\bx@t\@elt\bx@u\@elt\bx@v
+                      \@elt\bx@w\@elt\bx@x\@elt\bx@y\@elt\bx@z
+                      \@elt\bx@AA\@elt\bx@BB\@elt\bx@CC\@elt\bx@DD\@elt\bx@EE
+                      \@elt\bx@FF\@elt\bx@GG\@elt\bx@HH\@elt\bx@II\@elt\bx@JJ
+                      \@elt\bx@KK\@elt\bx@LL\@elt\bx@MM\@elt\bx@NN
+                      \@elt\bx@OO\@elt\bx@PP\@elt\bx@QQ\@elt\bx@RR
+                      \@elt\bx@SS\@elt\bx@TT\@elt\bx@UU\@elt\bx@VV
+                      \@elt\bx@WW\@elt\bx@XX\@elt\bx@YY\@elt\bx@ZZ}%
+    }{%
+      \@tufte@error{You may only call \string\morefloats\space twice. See the Tufte-LaTeX documentation for other workarounds}
+        {There are already 78 float slots allocated. Try using \string\FloatBarrier\space or \string\clearpage\space to place some floats before creating more.}
+    }%
+  }%
+}
+
+
+%%
+% Detect if the subfigure package has been loaded
+
+\newboolean{@tufte@packages@subfigure}
+\setboolean{@tufte@packages@subfigure}{false}
+\AtBeginDocument{%
+  \@ifpackageloaded{subfigure}
+    {\gsetboolean{@tufte@packages@subfigure}{true}}
+    {\gsetboolean{@tufte@packages@subfigure}{false}}%
+}
+
+
+%%
+% Detect of the float package has been loaded
+
+\AtBeginDocument{%
+  \@ifpackageloaded{float}{%
+    % Save the redefined float environment (instead of the LaTeX float environment)
+    \let\@tufte@orig@float\@float
+    \let\@tufte@orig@endfloat\end@float
+
+    % Define Tuftian float styles (with the caption in the margin)
+    \newcommand{\floatc@tufteplain}[2]{%
+      \begin{lrbox}{\@tufte@caption@box}%
+        \begin{minipage}[\floatalignment]{\marginparwidth}\hbox{}%
+          \@tufte@caption@font{\@fs@cfont #1:} #2\par%
+        \end{minipage}%
+      \end{lrbox}%
+      \smash{\hspace{\@tufte@caption@fill}\usebox{\@tufte@caption@box}}%
+    }
+    \newcommand{\fs@tufteplain}{%
+      \def\@fs@cfont{\@tufte@caption@font}%
+      \let\@fs@capt\floatc@tufteplain%
+      \def\@fs@pre{}%
+      \def\@fs@post{}%
+      \def\@fs@mid{}%
+      \let\@fs@iftopcapt\iftrue%
+    }
+    \let\fs@tufteplaintop=\fs@tufteplain
+    \let\floatc@tufteplaintop=\floatc@tufteplain
+    \newcommand\floatc@tufteruled[2]{%
+      {\@fs@cfont #1} #2\par%
+    }
+    \newcommand\fs@tufteruled{%
+      \def\@fs@cfont{\@tufte@caption@font}%
+      \let\@fs@capt\floatc@tufteplain%
+      \def\@fs@pre{\hrule height.8pt depth0pt width\textwidth \kern2pt}%
+      \def\@fs@post{\kern2pt\hrule width\textwidth\relax}%
+      \def\@fs@mid{}%
+      \let\@fs@iftopcapt\iftrue%
+    }
+    \newcommand\fs@tufteboxed{%
+      \def\@fs@cfont{}%
+      \let\@fs@capt\floatc@tufteplain%
+      \def\@fs@pre{%
+        \setbox\@currbox\vbox{\hbadness10000
+        \moveleft3.4pt\vbox{\advance\hsize by6.8pt
+          \hrule \hbox to\hsize{\vrule\kern3pt
+            \vbox{\kern3pt\box\@currbox\kern3pt}\kern3pt\vrule}\hrule}}
+      }%
+      \def\@fs@mid{\kern2pt}%
+      \def\@fs@post{}%
+      \let\@fs@iftopcapt\iftrue%
+    }
+  }{%
+    % Nothing to do
+  }
+}
+
+\AtBeginDocument{%
+  \@ifpackageloaded{algorithm}{%
+    % Set the float style to the Tuftian version
+    \ifthenelse{\equal{\ALG@floatstyle}{plain}\OR\equal{\ALG@floatstyle}{ruled}\OR\equal{\ALG@floatstyle}{boxed}}{%
+      \@tufte@info@noline{Switching algorithm float style from \ALG@floatstyle\space to tufte\ALG@floatstyle}%
+      \floatstyle{tufte\ALG@floatstyle}%
+      \restylefloat{algorithm}%
+    }{}%
+  }{%
+    % Nothing to do
+  }
+}
+
+
+%%
+% For compatibility with the subfig package, we'll set captions=false so that
+% it doesn't load the caption package (which modifies our own caption
+% formatting).
+
+\PassOptionsToPackage{caption=false}{subfig}
+
+
+%%
+% If debugging is enabled, print the Tufte-LaTeX options and the list of
+% files.
+
+\ifthenelse{\boolean{@tufte@debug}}
+  {\PrintTufteSettings\listfiles}
+  {}
+
+
+%%
+% If there is a `tufte-common-local.tex' file, load it up.
+
+\IfFileExists{tufte-common-local.tex}
+  {\input{tufte-common-local.tex}%
+   \@tufte@info@noline{Loading tufte-common-local.tex}}
+  {}
+
+
+%%
+% End of file
+\endinput
diff --git a/tufte-handout.cls b/tufte-handout.cls
new file mode 100644
index 0000000..73625ee
--- /dev/null
+++ b/tufte-handout.cls
@@ -0,0 +1,39 @@
+\NeedsTeXFormat{LaTeX2e}[1994/06/01]
+
+\ProvidesClass{tufte-handout}[2015/06/21 v3.5.2 Tufte-handout class]
+
+%%
+% Declare we're tufte-handout
+\newcommand{\@tufte@class}{article}% the base LaTeX class (defaults to the article/handout style)
+\newcommand{\@tufte@pkgname}{tufte-handout}% the name of the package (defaults to tufte-handout)
+
+%%
+% Load the common style elements
+\input{tufte-common.def}
+
+
+%%
+% Set up any handout-specific stuff now
+
+%%
+% Abstract
+
+% TODO The abstract should be printed on its own page of the `titlepage'
+% option was specified.
+\renewenvironment{abstract}
+  {\begin{quotation}\if@tufte@sfsidenotes\begin{sffamily}\fi}
+  {\if@tufte@sfsidenotes\end{sffamily}\fi\end{quotation}}
+
+
+%%
+% If there is a `tufte-handout-local.tex' file, load it.
+
+\IfFileExists{tufte-handout-local.tex}{%
+  \input{tufte-handout-local}%
+  \@tufte@info@noline{Loading tufte-handout-local.tex}%
+}{}
+
+
+%%
+% End of file
+\endinput
\ No newline at end of file