Irreducible factors of modular representations of mapping class groups arising in Integral TQFT

Abstract

We find decomposition series of length at most two for modular representations in positive characteristic of mapping class groups of surfaces induced by an integral version of the Witten-Reshetikhin-Turaev SO(3)-TQFT at the p-th root of unity, where p is an odd prime. The dimensions of the irreducible factors are given by Verlinde-type formulas.

arXiv comment29 pages, two conjectures made in Remark 7.3 of version 1 are now proved in the added subsection 7.5; simplified equation (5); added Remark 7.5; rewrote parts of section 4 to make paper more self-contained

Cited by in corpus (3)

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