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Merge pull request #4604 from stanbar/patch-1

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[set-theory/en] Add the vertical bar qualifier explanation
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Marcel Ribeiro Dantas 2023-02-24 23:04:24 -03:00 committed by GitHub
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@ -17,7 +17,7 @@ Set theory is a branch of mathematics that studies sets, their operations, and t
* the cross operator, `×`, means "the Cartesian product of".
### Qualifiers
* the colon qualifier, `:`, means "such that";
* the colon, `:`, or the vertical bar `|` qualifiers are interchangeable and mean "such that";
* the membership qualifier, `∈`, means "belongs to";
* the subset qualifier, `⊆`, means "is a subset of";
* the proper subset qualifier, `⊂`, means "is a subset of but is not equal to".