Hessenberg's theorem

The following theorems of Gerhard Hessenberg (1874–1925) are referred to as the Hessenberg theorem in mathematics :

• The set of Hessenberg (set theory) states: Every infinite cardinal number is equal in power to their square.
• The set of Hessen Berg (geometry) states that: In each projective plane of the set of Desargues from the set of Pappos follows.

This is a disambiguation page for differentiating between several terms identified with the same word.