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-rw-r--r--pages/measure-and-integration/measure-theory/measures.md4
1 files changed, 2 insertions, 2 deletions
diff --git a/pages/measure-and-integration/measure-theory/measures.md b/pages/measure-and-integration/measure-theory/measures.md
index c843881..5ad3308 100644
--- a/pages/measure-and-integration/measure-theory/measures.md
+++ b/pages/measure-and-integration/measure-theory/measures.md
@@ -7,7 +7,7 @@ nav_order: 4
# {{ page.title }}
-{% definition %}
+{% definition Measure %}
A *measure* on a σ-algebra $\mathcal{A}$ on a set $X$
is mapping $\mu : \mathcal{A} \to [0,\infty]$ such that
@@ -17,7 +17,7 @@ is mapping $\mu : \mathcal{A} \to [0,\infty]$ such that
$$
\mu \bigg\lparen \bigcup_{n=1}^{\infty} A_n \! \bigg\rparen
- = \sum_{n=0}^{\infty} \mu(A_n).
+ = \sum_{n=1}^{\infty} \mu(A_n).
$$
{% enddefinition %}