The cobordism category and Waldhausen's K-theory

Details The cobordism category and Waldhausen's K-theory The cobordism category and Waldhausen's K-theory

2011-02-21

arxiv.org/abs/1102.4155v1

Mathematics

Algebraic Topology

Scientific paper

This paper examines the category C^k_{d,n} whose morphisms are d-dimensional smooth manifolds that are properly embedded in the product of a k-dimensional cube with an (d+n-k)-dimensional Euclidean space. There are k directions to compose k-dimensional cubes, so C^k_{d,n} is a (strict) k-tuple category. The geometric realization of the k-dimensional multi-nerve is the classifying space BC^k_{d,n}. At the end of the paper we construct an infinite loop map to Waldhausens K-theory. \Omega BC^1_{d,n}-> A(BO(d)), We believe that the map factors through \Omega^\infty\Sigma^\infty(BO(d)_+) and that the composite B{Diff}(M^d)\to A(BO(d)) is homotopic to the map considered by Dwyer, Williams and Weiss.

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