Difference L operators related to q-characters

Details Difference L operators related to q-characters Difference L operators related to q-characters

2001-09-20

arxiv.org/abs/math/0109140v1

J.Phys.A35:1415-1436,2002

Mathematics

Quantum Algebra

25 pages, LaTeX2e, no figure

Scientific paper

10.1088/0305-4470/35/6/307

We introduce a factorized difference operator L(u) annihilated by the Frenkel-Reshetikhin screening operator for the quantum affine algebra U_q(C^{(1)}_n). We identify the coefficients of L(u) with the fundamental q-characters, and establish a number of formulas for their higher analogues. They include Jacobi-Trudi and Weyl type formulas, canceling tableau sums, Casorati determinant solution to the T-system, and so forth. Analogous operators for the orthogonal series U_q(B^{(1)}_n) and U_q(D^{(1)}_n) are also presented.

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