From c4ec16c8b34f84f0e95d2988df083c6d31ba21ef Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Wed, 10 Mar 2021 15:26:15 +0100
Subject: Expand knowledge base

---
 content/know/concept/dirac-delta-function/index.pdc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'content/know/concept/dirac-delta-function')

diff --git a/content/know/concept/dirac-delta-function/index.pdc b/content/know/concept/dirac-delta-function/index.pdc
index 3982afc..6c9f2b0 100644
--- a/content/know/concept/dirac-delta-function/index.pdc
+++ b/content/know/concept/dirac-delta-function/index.pdc
@@ -13,8 +13,10 @@ markup: pandoc
 
 # Dirac delta function
 
-The **Dirac delta function** $\delta(x)$, often just called the **delta function**,
-is an infinitely narrow discontinuous "spike" at $x = 0$ whose area is
+The **Dirac delta function** $\delta(x)$, often just the **delta function**,
+is a function (or, more accurately, a [Schwartz distribution](/know/concept/schwartz-distribution/))
+that is commonly used in physics.
+It is an infinitely narrow discontinuous "spike" at $x = 0$ whose area is
 defined to be 1:
 
 $$\begin{aligned}
@@ -29,7 +31,7 @@ $$\begin{aligned}
     }
 \end{aligned}$$
 
-It is sometimes also called the **sampling function**, due to its most
+It is sometimes also called the **sampling function**, thanks to its most
 important property: the so-called **sampling property**:
 
 $$\begin{aligned}
-- 
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