# Poincaré duality

> duality that relates homology and cohomology groups for oriented closed manifolds

**Wikidata**: [Q2063099](https://www.wikidata.org/wiki/Q2063099)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Poincaré_duality)  
**Source**: https://4ort.xyz/entity/poincar-duality


## References

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