Freiman's theorem

English

Etymology

The result is due to Gregory Freiman (1964, 1966).

Proper noun

Freiman's theorem

1. (mathematics) In additive combinatorics, a central result that indicates the approximate structure of sets whose sumset is small. It roughly states that if $|A+A|/|A|$ is small, then $A$ can be contained in a small generalized arithmetic progression.