An infrasolvmanifold which does not bound

Details An infrasolvmanifold which does not bound An infrasolvmanifold which does not bound

2011-06-20

arxiv.org/abs/1106.4062v1

Mathematics

Geometric Topology

Scientific paper

Every 4-dimensional infrasolvmanifold $M$ with $\beta_1(M;\mathbb{Q})>0$ or which is flat or has one of the geometries $\mathbb{N}il^4$, $\mathbb{S}ol_{m,n}^4$, or $\mathbb{S}ol_0^4$ bounds. However there are non-orientable $\mathbb{S}ol_1^4$-manifolds which do not bound. The question remains open for $\mathbb{N}il^3\times\mathbb{E}^1$-manifolds. We also give simple cobounding 5-manifolds for all but five of the 74 flat 4-manifolds, and investigate which orientable flat 4-manifolds embed in $\mathbb{R}^5$.

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