Abstract

We study the embedding U'q(so3)?Uq(sl3), where Uq(sl3) is a well known Drinfeld-Jimbo quantum algebra and the algebra U'q(so3) is the cyclically symmetric q-deformation of the universal enveloping algebra U(so3) of the Lie algebra so3 which is not a Drinfeld-Jimbo quantum algebra. Finite-dimensional irreducible representations of Uq(sl3) are decomposed into irreducible representations of U'q(so3). An explicit expression for the matrix of the transition from the Gel'fand-Tsetlin basis for Uq(sl3) to the bases of irreducible representations of U'q(so3) is calculated for representations of Uq(sl3) with highest weights (l,0,0). Entries of this matrix are expressed in terms of products of dual q-Krawtchouk polynomials and dual q-Hahn polynomials. Expressions for representation operators of Uq(sl3) in the U'q(so3) basis are given.

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