diff --git a/_data/widgets/navv/mathematics.yml b/_data/widgets/navv/mathematics.yml
index 6feb8ca..42c73ce 100644
--- a/_data/widgets/navv/mathematics.yml
+++ b/_data/widgets/navv/mathematics.yml
@@ -46,8 +46,8 @@ menu:
       link: /mathematics/matrix/dimensionoperations.html#dot-product-and-cross-product
     - caption: Selective operations
       link: /mathematics/matrix/dimensionoperations.html#selective-operations
-    - caption: Copy and inverse matrix
-      link: /mathematics/matrix/dimensionoperations.html#copy-and-inverse-matrix
+    - caption: Copy and transpose matrix
+      link: /mathematics/matrix/dimensionoperations.html#copy-and-transpose-matrix
     - caption: Aggregation operations
       link: /mathematics/matrix/dimensionoperations.html#aggregation-operations
     - caption: Random number library
@@ -121,10 +121,6 @@ menu:
       link: /mathematics/openblas/arraybuffer.html#php-interface
     - caption: Usage on PHP
       link: /mathematics/openblas/arraybuffer.html#usage-on-php
-    - caption: C language interface
-      link: /mathematics/openblas/arraybuffer.html#c-language-interface
-    - caption: Usage on C language
-      link: /mathematics/openblas/arraybuffer.html#usage-on-c-language
   - caption: BLAS libray
     link: /mathematics/openblas/blaslibrary.html
     menu:
@@ -134,8 +130,6 @@ menu:
       link: /mathematics/openblas/blaslibrary.html#how-it-is-implemented
     - caption: Usage on PHP
       link: /mathematics/openblas/blaslibrary.html#usage-on-php
-    - caption: What is BLAS
-      link: /mathematics/openblas/blaslibrary.html#what-is-blas
   - caption: Math libray
     link: /mathematics/openblas/mathlibrary.html
     menu:
@@ -154,10 +148,12 @@ menu:
   - caption: Rindow CLBlast FFI
     link: /mathematics/acceleration/opencl.html#rindow-clblast-ffi
   - caption: OpenCLMath liblary
-    link: /mathematics/acceleration/opencl.html#openclmath-liblary-in-rindow-math-matrix
+    link: /mathematics/acceleration/opencl.html#openclmath-library-for-rindow-math-matrix
   - caption: Requirements
     link: /mathematics/acceleration/opencl.html#requirements
-  - caption: How to setup pre-build binaries
-    link: /mathematics/acceleration/opencl.html#how-to-setup-pre-build-binaries
+  - caption: GPU/OpenCL support for Windows
+    link: /mathematics/acceleration/opencl.html#gpuopencl-support-for-windows
+  - caption: GPU/OpenCL support for Linux
+    link: /mathematics/acceleration/opencl.html#gpuopencl-support-for-linux
 - caption: API reference
   link: /mathematics/api/apitoc.html