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Tangle functors from semicyclic representations
Journal article   Peer reviewed

Tangle functors from semicyclic representations

Nathan Druivenga, Charles Frohman and Sanjay Kumar
Journal of knot theory and its ramifications, Vol.26(11), p.1750065
10/01/2017
DOI: 10.1142/S0218216517500651
url
https://arxiv.org/pdf/1607.02070View
Open Access

Abstract

Let q be a 2Nth root of unity where N is odd. Let U-q(epsilon) (sl(2)) denote the quantum group with large center corresponding to the Lie algebra sl(2)C with generators E, F, K, and K-1. A semicyclic representation of U-q(epsilon) (sl(2)) is an N-dimensional irreducible representation rho : U-q(s) (sl(2)) -> MN(C), so that rho(E-N) = aId with a not equal 0, rho(F-N) = 0 and rho(K-N) = Id. We construct a tangle functor for framed homogeneous tangles colored with semicyclic representations, and prove that for (1, 1)-tangles coming from knots, the invariant defined by the tangle functor coincides with Kashaev's invariant.
Mathematics Physical Sciences Science & Technology

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