Cantor's theorem

English

Etymology

Named after German mathematician George Cantor (1845-1918) who stated and proved this theorem.

Proper noun

Cantor's theorem

1. (set theory) A theorem in set theory which states for any set $A$, the set of all subsets of $A$ (the power set of $A$, denoted by ${\mathcal {P}}(A)$) has a strictly greater cardinality than $A$ itself.