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Clebsch-Gordan and Racah-Wigner coefficients for a continuous series of representations of U_q(sl(2,R))

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arxiv math/0007097 v2 pith:FYOMEKKD submitted 2000-07-15 math.QA hep-th

classification math.QAhep-th
keywords coefficientskernelrepresentationsclebsch-gordancontinuousintegralirreduciblesproducts
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abstract

The decomposition of tensor products of representations into irreducibles is studied for a continuous family of integrable operator representations of $U_q(sl(2,R)$. It is described by an explicit integral transformation involving a distributional kernel that can be seen as an analogue of the Clebsch-Gordan coefficients. Moreover, we also study the relation between two canonical decompositions of triple tensor products into irreducibles. It can be represented by an integral transformation with a kernel that generalizes the Racah-Wigner coefficients. This kernel is explicitly calculated.

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Cited by 11 Pith papers

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