From f9f062d4382a5f501420ffbe4f19902fe94cf480 Mon Sep 17 00:00:00 2001
From: Prefetch
Date: Sun, 31 Oct 2021 13:54:31 +0100
Subject: Expand knowledge base

---
 content/know/concept/sigma-algebra/index.pdc | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'content/know/concept/sigma-algebra/index.pdc')

diff --git a/content/know/concept/sigma-algebra/index.pdc b/content/know/concept/sigma-algebra/index.pdc
index 6e90fcb..690c4cc 100644
--- a/content/know/concept/sigma-algebra/index.pdc
+++ b/content/know/concept/sigma-algebra/index.pdc
@@ -42,6 +42,9 @@ Likewise, a **sub-$\sigma$-algebra**
 is a sub-family of a certain $\mathcal{F}$,
 which is a valid $\sigma$-algebra in its own right.
 
+
+## Notable examples
+
 A notable $\sigma$-algebra is the **Borel algebra** $\mathcal{B}(\Omega)$,
 which is defined when $\Omega$ is a metric space,
 such as the real numbers $\mathbb{R}$.
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