# Beltrami's theorem

> geodesic maps preserve the property of having constant curvature

**Wikidata**: [Q4884789](https://www.wikidata.org/wiki/Q4884789)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Beltrami's_theorem)  
**Source**: https://4ort.xyz/entity/beltrami-s-theorem