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Evaluable Jones-Wenzl idempotents at root of unity and modular representation on the center of U_qsl(2)

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      Abstract

      Let p an integer. We define a family of idempotents (and nilpotents) in the Temperley - Lieb algebras at 4p-th roots of unity which generalize the usual Jones-Wenzl idempotents. These new idempotents correspond to finite dimentional simple and projective indecomposable representations of the restricted quantum group Uqsl(2), where q is a 2p-th root of unity. In the manner of the [BHMV95] topological quantum field theorie (TQFT), they provide a canonical basis in colored skein modules to define mapping class groups representations. In the torus case, this basis allows us to obtain a partial match between the negative twist and the buckling actions, and the [LM94] induced representation of SL2(Z) on the center of Uqsl(2), which extends non trivially the [RT91] representation of SL2(Z).

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      Journal
      2016-04-13
      1604.03681

      http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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      PhD thesis
      math.QA math.GT

      Geometry & Topology, Algebra

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