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authorAdam Bard <github@adambard.com>2020-10-01 07:45:31 -0700
committerGitHub <noreply@github.com>2020-10-01 07:45:31 -0700
commitc35670808e8bbf734bea5c2aa2fd280342f40b17 (patch)
tree8dfd0e329d4c9bd151a9001b9e84f0476cb87697 /set-theory.html.markdown
parenta5016783f3eb482f0dc1484279279820df9a0ab0 (diff)
parent7d927011da46e767371334a54ab9e6bca6730f7f (diff)
Merge pull request #4017 from pavi2410/patch-1
[set-theory/en] Correction: Cardinality of an empty set is 0
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diff --git a/set-theory.html.markdown b/set-theory.html.markdown
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@@ -44,7 +44,7 @@ For example, if `S = { 1, 2, 4 }`, then `|S| = 3`.
* 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 1, i.e. `|∅| = 1`.
+* the cardinality of the empty set is 0, i.e. `|∅| = 0`.
## Representing sets