# Mayer–Vietoris sequence

> long exact sequence describing how the (co)homology of a space relates to that of two subspaces whose interiors cover the total space

**Wikidata**: [Q2421905](https://www.wikidata.org/wiki/Q2421905)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mayer–Vietoris_sequence)  
**Source**: https://4ort.xyz/entity/mayer-vietoris-sequence


## References

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