Thom Prospectra for Loopgroup representations

Details Thom Prospectra for Loopgroup representations Thom Prospectra for Loopgroup representations

2004-04-29

arxiv.org/abs/math/0404541v1

Mathematics

Algebraic Topology

Scientific paper

We construct an S^1-equivariant prospectrum that models the Atiyah dual of a free loop space of a manifold. By applying a suitably completed S^1-equivariant K-theory to the Atiyah dual, we show how to recover the Witten genus of the manifold. The main technical tool is a Tits building for the loop group. We use this building to construct a dualizing spectrum for the loop group and relate it to work of Freed, Hopkins and Teleman.

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