Linked from
The 17 pages that link to Cantor's theorem, each with the reason it gives.
Power setRelated: It shows that taking a power set always produces a larger cardinality.
Georg CantorBroader topic: It establishes an endless hierarchy of larger infinite cardinalities.
Countable setRelated: It guarantees uncountable sets even when starting with a countable set.
Cardinal numberRelated: It proves that infinite cardinalities have no largest member.
Infinite setRelated: It shows that no infinite set is as large as its collection of subsets.