# Riemannian Penrose inequality

> estimates the mass of a spacetime in terms of the total area of its black holes

**Wikidata**: [Q7333121](https://www.wikidata.org/wiki/Q7333121)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Riemannian_Penrose_inequality)  
**Source**: https://4ort.xyz/entity/riemannian-penrose-inequality