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Taras Banakh
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Classification of closed 3-manifolds with trivialfinite first homology group?

By the Poincare Conjecture (confiremd by Perelman), each simply-connected closed 3-manifold is homeomorphic to the 3-sphere.

I am interested in a topological classification of connected closed 3-manifold $M$ that have trivialfinite homology group $H_1(M;G)$ for$H_1(M)$.

Since $H_1(M)$ is the abelization of the fundamental group $\pi_1(M)$, each closed 3-manifold with finite homotopy group has finite homology group. It is known that each closed 3-manifold with finite homotopy group $\Gamma$ is a suitable coefficientspherical 3-manifold (i.e., is the orbit space $S^3/_\sim$ of the 3-sphere, endowed with a free action of the group $G$$\Gamma$).

Question. Is each closed 3-manifold with trivial homology group a spherical 3-manifold? Equivlalently, is the listfundamental group $\pi_1(M)$ of such manifolda closed 3-manifold finite if its first homology group $H_1(M)$ is finite?

I the moment I see two 3-manifolds in this list: the 3-sphere and the homology 3-sphere of Poincare.

Classification of closed 3-manifolds with trivial first homology group?

By the Poincare Conjecture (confiremd by Perelman), each simply-connected closed 3-manifold is homeomorphic to the 3-sphere.

I am interested in a topological classification of connected closed 3-manifold $M$ that have trivial homology group $H_1(M;G)$ for a suitable coefficient group $G$.

Question. Is the list of such manifold finite?

I the moment I see two 3-manifolds in this list: the 3-sphere and the homology 3-sphere of Poincare.

Classification of closed 3-manifolds with finite first homology group?

I am interested in a topological classification of connected closed 3-manifold $M$ that have finite homology group $H_1(M)$.

Since $H_1(M)$ is the abelization of the fundamental group $\pi_1(M)$, each closed 3-manifold with finite homotopy group has finite homology group. It is known that each closed 3-manifold with finite homotopy group $\Gamma$ is a spherical 3-manifold (i.e., is the orbit space $S^3/_\sim$ of the 3-sphere, endowed with a free action of the group $\Gamma$).

Question. Is each closed 3-manifold with trivial homology group a spherical 3-manifold? Equivlalently, is the fundamental group $\pi_1(M)$ of a closed 3-manifold finite if its first homology group $H_1(M)$ is finite?

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Taras Banakh
  • 41.8k
  • 3
  • 74
  • 183

Classification of closed 3-manifolds with trivial first homology group?

By the Poincare Conjecture (confiremd by Perelman), each simply-connected closed 3-manifold is homeomorphic to the 3-sphere.

I am interested in a topological classification of connected closed 3-manifold $M$ that have trivial homology group $H_1(M;G)$ for a suitable coefficient group $G$.

Question. Is the list of such manifold finite?

I the moment I see two 3-manifolds in this list: the 3-sphere and the homology 3-sphere of Poincare.