# Ricci curvature

> 2-tensor obtained as a contraction of the Riemann curvature 4-tensor on a Riemannian manifold (or, more generally, a smooth manifold equipped with affine connection)

**Wikidata**: [Q1195879](https://www.wikidata.org/wiki/Q1195879)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ricci_curvature)  
**Source**: https://4ort.xyz/entity/ricci-curvature


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)