# Kirby–Siebenmann class

> Cohomology class of topological structures

**Wikidata**: [Q6414983](https://www.wikidata.org/wiki/Q6414983)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kirby–Siebenmann_class)  
**Source**: https://4ort.xyz/entity/kirby-siebenmann-class