diff --git a/config/en/mkdocs.yaml b/config/en/mkdocs.yaml
index 17c7157..9388ddf 100755
--- a/config/en/mkdocs.yaml
+++ b/config/en/mkdocs.yaml
@@ -118,12 +118,12 @@ nav:
     - 'Mathematical physics': 
       - 'Signal analysis': 
         - 'Signals': physics/mathematical-physics/signal-analysis/signals.md
-        - 'Fourier series': 
-        - 'Fourier transform': 
-        - 'Discrete Fourier transform': 
+#        - 'Fourier series': 
+#        - 'Fourier transform': 
+#        - 'Discrete Fourier transform': 
     - 'Electromagnetism': 
-      - 'Electrostatics':
-      - 'Magnetostatics': 
+#      - 'Electrostatics':
+#      - 'Magnetostatics': 
       - 'Maxwell-equations': physics/electromagnetism/maxwell-equations.md
       - 'Optics':
         - 'Waves': physics/electromagnetism/optics/waves.md