From 26d2733ab775e1138bfd83fe14253035275671b9 Mon Sep 17 00:00:00 2001 From: Justice Almanzar Date: Mon, 24 Aug 2020 16:45:36 -0400 Subject: [PATCH] correct equality statement --- set-theory.html.markdown | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/set-theory.html.markdown b/set-theory.html.markdown index 6fb657ed..e292464c 100644 --- a/set-theory.html.markdown +++ b/set-theory.html.markdown @@ -82,7 +82,7 @@ D = { 2x : x ∈ N } = { 0, 2, 4, 6, 8, ... } * If two sets contain the same items then we say the sets are equal, e.g. `A = B`. * Order does not matter when determining set equality, e.g. `{ 1, 2, 3, 4 } = { 2, 3, 1, 4 }`. * Sets are disjoint, meaning elements cannot be repeated, e.g. `{ 1, 2, 2, 3, 4, 3, 4, 2 } = { 1, 2, 3, 4 }`. -* Two sets `A` and `B` are equal if and only if `A ⊂ B` and `B ⊂ A`. +* Two sets `A` and `B` are equal if and only if `A ⊆ B` and `B ⊆ A`. ## Special Sets