(Q5399573)
Statements
![{\displaystyle {\begin{aligned}&\phi \colon \operatorname {H} _{n}(M)\to \operatorname {H} _{n}(K(\pi _{1}(M),1))\\&\phi ([M])\neq 0\end{aligned}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4910433335e3142069b45a836756dbff3a2f41a1)
Identifiers
Sitelinks
Wikipedia(3 entries)
- enwiki Essential manifold
- ruwiki Существенное многообразие
- ukwiki Істотний многовид
compact manifold M whose fundamental class [M] defines a nonzero element under the natural homomorphism Hₙ(M) → Hₙ(K(π₁(M),1))