From ea6b3092dbd23e5ec1132a39e79d4a627d221403 Mon Sep 17 00:00:00 2001 From: Spencer Burris Date: Sat, 27 Feb 2021 18:28:37 -0800 Subject: [set-theory/en] use not equal ASCII symbol --- 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 6be7aa00..ae8b5388 100644 --- a/set-theory.html.markdown +++ b/set-theory.html.markdown @@ -41,7 +41,7 @@ The cardinality, or size, of a set is determined by the number of items in the s For example, if `S = { 1, 2, 4 }`, then `|S| = 3`. ### The Empty Set -* The empty set can be constructed in set builder notation using impossible conditions, e.g. `∅ = { x : x =/= x }`, or `∅ = { x : x ∈ N, x < 0 }`; +* The empty set can be constructed in set builder notation using impossible conditions, e.g. `∅ = { x : x ≠ x }`, or `∅ = { x : x ∈ N, x < 0 }`; * the empty set is always unique (i.e. there is one and only one empty set); * the empty set is a subset of all sets; * the cardinality of the empty set is 0, i.e. `|∅| = 0`. -- cgit v1.2.3