fix typo

Signed-off-by: Marcello Seri <[email protected]>

5-tensors.tex

@@ -139,7 +139,7 @@ \section{Tensors}
 \begin{definition}\label{def:metric}
   We call \emph{pseudo-metric tensor}, any tensor $g\in T_2^0(V)$ that is
   \begin{enumerate}
-    \item symmetric, i.e. $g(v,w) = g(v,w)$ for all $v,w\in T_0^1(V)$;
+    \item symmetric, i.e. $g(v,w) = g(w,v)$ for all $v,w\in T_0^1(V)$;
     \item positive definite, i.e. $g(v,v)\geq0$ for all $v\neq 0$.
   \end{enumerate}