From 073a0fb3b666bcb7ee49757ac8724867a9efdce1 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sun, 21 Feb 2021 15:34:10 +0100
Subject: Add "Dirac delta function"

---
 content/know/category/index.md | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'content/know/category/index.md')

diff --git a/content/know/category/index.md b/content/know/category/index.md
index b8f0456..ba4936c 100644
--- a/content/know/category/index.md
+++ b/content/know/category/index.md
@@ -9,5 +9,11 @@ Alphabetical list of categories in this knowledge base.
 Note that these categories might overlap,
 i.e. share certain concepts.
 
+## M
+* [Mathematics](/know/category/mathematics/)
+
+## P
+* [Physics](/know/category/physics/)
+
 ## Q
 * [Quantum mechanics](/know/category/quantum-mechanics/)
-- 
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