added closed interval

1 files changed, 2 insertions, 1 deletions

diff --git a/Problem Set 1.page b/Problem Set 1.page
index a58e2dc..9ea5399 100644
--- a/Problem Set 1.page
+++ b/Problem Set 1.page
@@ -7,7 +7,8 @@
     - $\mathbb{N} \times \mathbb{N}$
     - $\mathbb{Q}$ = Set of all fractions $\frac{n}{m}$ where $n,m \in \mathbb{Z}$
     - $\mathbb{R}$
-    - $(0,1)$
+    - The open interval $(0,1)$
+    - The closed interval $[0,1]$
     - $2^{\mathbb{N}}$ = Set of all subsets of $\mathbb{N}$.
     - $2^{\mathbb{R}}$ = Set of all subsets of $\mathbb{R}$.
     - $\mathbb{R}^{\mathbb{R}}$ = Set of all functions from $\mathbb{R}$ to itself.