# pseudo-Riemannian manifold

> smooth manifold equipped with nowhere degenerate (but not necessarily positive-definite) metric tensor

**Wikidata**: [Q1510587](https://www.wikidata.org/wiki/Q1510587)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Pseudo-Riemannian_manifold)  
**Source**: https://4ort.xyz/entity/pseudo-riemannian-manifold


## References

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