# essential manifold

> compact manifold M whose fundamental class [M] defines a nonzero element under the natural homomorphism Hₙ(M) → Hₙ(K(π₁(M),1))

**Wikidata**: [Q5399573](https://www.wikidata.org/wiki/Q5399573)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Essential_manifold)  
**Source**: https://4ort.xyz/entity/essential-manifold