Set-builder notation

Describes the set of all elements x of a domain A that satisfy the predicate P(x). It is the standard way to define a subset by stating the property its members must have.

\{ x \in A \mid P(x) \}

What the symbols mean

a generic element of the set being defined
the domain of discourse, the set from which elements are drawn
the membership relation, read as 'is an element of'
a predicate, a property that x either satisfies or does not
read as 'such that'

About this formula

  • FieldMathematics
  • TopicSet theory
  • LevelHigh school
  • Also calledset comprehension, set builder, defining a set by a property, set-builder form, set specification by predicate
  • SourceWikidata Q3352804

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