Positive representations of split real quantum groups and future perspectives

Details Positive representations of split real quantum groups and future perspectives Positive representations of split real quantum groups and future perspectives

2011-11-04

arxiv.org/abs/1111.1033v1

Mathematics

Representation Theory

35 pages, 3 figures

Scientific paper

We construct a special principal series representation for the modular double $U_{q\tilde{q}}(g_R)$ of type $A_r$ representing the generators by positive essentially self-adjoint operators satisfying the transcendental relations that also relate $q$ and $\tilde{q}$. We use the cluster variables parametrization of the positive unipotent matrices to derive the formulas in the classical case. Then we quantize them after applying the Mellin transform. Our construction is inspired by the previous results for $g_R=sl(2,R)$ and is expected to have a generalization to other simply-laced types. We conjecture that our positive representations are closed under the tensor product and we discuss the future perspectives of the new representation theory following the parallel with the established developments of the finite-dimensional representation theory of quantum groups.

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