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| -rw-r--r-- | set-theory.html.markdown | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/set-theory.html.markdown b/set-theory.html.markdown index d55ab7d5..f89345c0 100644 --- a/set-theory.html.markdown +++ b/set-theory.html.markdown @@ -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". |