Absolute Whitehead torsion

Details Absolute Whitehead torsion Absolute Whitehead torsion

2005-02-16

arxiv.org/abs/math/0502349v1

Mathematics

Algebraic Topology

To appear in the MPI preprint series

Scientific paper

We refine the Whitehead torsion of a chain equivalence of finite chain complexes in an additive category $\bA$ from an element of $\widetilde{K}^{iso}_1(\bA)$ to an element of the absolute group $K_1^{iso}(\bA)$. We apply this invariant to symmetric Poincar\'e complexes and identify it in terms of more traditional invariants. In the companion paper [1] (joint with Ian Hambleton and Andrew Ranicki) this new invariant is applied to obtain the multiplicativity of the signature of fibre bundles mod 4.

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