Homotopy classification of $4$-manifolds with $3$-manifold fundamental group
Homotopy classification of $4$-manifolds with $3$-manifold fundamental group
We give a criterion on a group $Ï$ and a homomorphism $w \colon Ï\to C_2$ under which closed $4$-manifolds with fundamental group $Ï$ and orientation character $w$ are classified up to homotopy equivalence by their quadratic $2$-types. We verify the criterion for a large class of $3$-manifold groups and orientation characters, in particular for the fundamental group $Ï$ of any closed, orientable $3$-manifold whose finite subgroups are cyclic, provided $w$ vanishes on every element of $Ï$ of finite order. We deduce a homeomorphism classification of closed, orientable $4$-manifolds with infinite dihedral fundamental group $\mathbb{Z}/2 * \mathbb{Z}/2$.
Jonathan Hillman、Daniel Kasprowski、Mark Powell、Arunima Ray
数学
Jonathan Hillman,Daniel Kasprowski,Mark Powell,Arunima Ray.Homotopy classification of $4$-manifolds with $3$-manifold fundamental group[EB/OL].(2025-08-10)[2025-08-24].https://arxiv.org/abs/2508.07504.点此复制
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