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Spaces of PL Manifolds and Categories of Simple Maps (AM-186

Автор: Bo0mB0om » 12 июня 2016
Spaces of PL Manifolds and Categories of Simple Maps (AM-186
Friedhelm Waldhausen, Bjørn Jahren, John Rognes, "Spaces of PL Manifolds and Categories of Simple Maps (AM-186"
English | ISBN: 0691157758, 0691157766 | 2013 | 192 pages | PDF | 1 MB



Since its introduction by Friedhelm Waldhausen in the 1970s, the algebraic K-theory of spaces has been recognized as the main tool for studying parametrized phenomena in the theory of manifolds. However, a full proof of the equivalence relating the two areas has not appeared until now. This book presents such a proof, essentially completing Waldhausen's program from more than thirty years ago.
The main result is a stable parametrized h-cobordism theorem, derived from a homotopy equivalence between a space of PL h-cobordisms on a space X and the classifying space of a category of simple maps of spaces having X as deformation retract. The smooth and topological results then follow by smoothing and triangulation theory.
The proof has two main parts. The essence of the first part is a "desingularization," improving arbitrary finite simplicial sets to polyhedra. The second part compares polyhedra with PL manifolds by a thickening procedure. Many of the techniques and results developed should be useful in other connections.

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