Resolutions of p-Modular TQFT's and Representations of Symmetric Groups

Details Resolutions of p-Modular TQFT's and Representations of Symmetric Groups Resolutions of p-Modular TQFT's and Representations of Symmetric Groups

2001-09-30

arxiv.org/abs/math/0110006v3

Mathematics

Geometric Topology

29 pages

Scientific paper

We construct families of TQFT's over the finite field Z/pZ starting from an integral TQFT obtained by Frohman and Nicas. These TQFT's are likely to describe the constant order contributions of the cyclotomic integer expansions of the Reshetikhin Turaev Ohtsuki theories. Their modular structure is intimately related to the p-modular representation theory of the symmetric groups S_n. We construct resolutions of simple p-modular TQFT's and S_n-modules over Z/pZ using powers of Lefschetz operators. These yield expansions of the irreducible p-modular S_n-characters in terms of the ordianry ones as well as expressions for the Alexander Polynomial of a 3-manifold evaluated at a p-th root of unity in terms of traces in the irreducible modular TQFT's over covering cobordisms. Together with identifications with the constant orders of quantum TQFT's this results, e.g., in non-trivial criteria for a group to be a 3-manifold group.

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