# sigma-algebra

> algebraic structure closed under numerable union, intersection, and complement.

**Wikidata**: [Q217357](https://www.wikidata.org/wiki/Q217357)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Σ-algebra)  
**Source**: https://4ort.xyz/entity/sigma-algebra


## References

1. Nuovo soggettario
2. Quora