The equivariant stable homotopy theory around isometric linear maps

Details The equivariant stable homotopy theory around isometric linear maps The equivariant stable homotopy theory around isometric linear maps

2011-01-11

arxiv.org/abs/1101.2142v1

Mathematics

Algebraic Topology

PhD thesis, 115 pages

Scientific paper

The non-equivariant topology of Stiefel manifolds has been studied extensively, culminating in a result of Miller demonstrating that a Stiefel manifold splits stably to a wedge of Thom spaces over Grassmannians. Equivariantly, one can consider spaces of isometries between representations as an analogue to Stiefel manifolds. This concept, however, yields a different theory to the non-equivariant case. We first construct a variation on the theory of the functional calculus before studying the homotopy-theoretic properties of this theory. This allows us to construct the main result; a natural tower of G-spectra running down from equivariant isometries which manifests the pieces of the non-equivariant splitting in the form of the homotopy cofibres of the tower. Furthermore, we detail extra topological properties and special cases of this theory, developing explicit expressions covering the tower's geometric and topological structure. We conclude with two detailed conjectures which provide an avenue for future study. Firstly we explore how our theory interacts with the splitting of Miller, proving partial results linking in our work with Miller's and conjecturing even deeper connections. Finally, we begin to calculate the equivariant K-theory of the tower, conjecturing and providing evidence towards the idea that the rich topological structure will be mirrored on the K-theory level by a similarly deep algebraic structure.

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