Power set: Difference between revisions
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imported>Richard Pinch (subpages) |
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In [[set theory]], the '''power set''' of a set ''X'' is the set of all [[subset]]s of ''X''. | In [[set theory]], the '''power set''' of a set ''X'' is the set of all [[subset]]s of ''X''. | ||
:<math> \mathcal{P}X = \{ A : A \subseteq X \} . \, </math> | :<math> \mathcal{P}X = \{ A : A \subseteq X \} . \, </math> | ||
