On the splitting problem for manifold pairs with boundaries

Details On the splitting problem for manifold pairs with boundaries On the splitting problem for manifold pairs with boundaries

2006-08-29

arxiv.org/abs/math/0608728v1

Abh. Math. Sem. Univ. Hamburg 76 (2006), 35-55.

Mathematics

Geometric Topology

Abh. Math. Sem. Univ. Hamburg, to appear

Scientific paper

10.1007/BF02960853

The problem of splitting a homotopy equivalence along a submanifold is closely related to the surgery exact sequence and to the problem of surgery of manifold pairs. In classical surgery theory there exist two approaches to surgery in the category of manifolds with boundaries. In the $ rel \partial$ case the surgery on a manifold pair is considered with the given fixed manifold structure on the boundary. In the relative case the surgery on the manifold with boundary is considered without fixing maps on the boundary. Consider a normal map to a manifold pair $(Y, \partial Y)\subset (X, \partial X)$ with boundary which is a simple homotopy equivalence on the boundary $\partial X$. This map defines a mixed structure on the manifold with the boundary in the sense of Wall. We introduce and study groups of obstructions to splitting of such mixed structures along submanifold with boundary $(Y, \partial Y)$. We describe relations of these groups to classical surgery and splitting obstruction groups. We also consider several geometric examples.

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