Some multiplication formulas in an affine Hecke algebra

Details Some multiplication formulas in an affine Hecke algebra Some multiplication formulas in an affine Hecke algebra

2010-03-25

arxiv.org/abs/1003.4817v2

Mathematics

Representation Theory

11 pages

Scientific paper

In this paper we consider the Hecke algebra $\mathcal {H}$ associated to an extended affine Weyl group of type $\widetilde{B_2}$. We give some interesting formulas on $C_{rt}S_{\lambda}$, which imply some relations between the Kazhdan-Lusztig coefficients $\mu (y,w)$ and representations of some algebraic groups. Here $C_{rt}$ is one element in the Kazhdan-Lusztig basis of $\mathcal {H}$ and $S_{\lambda}$ is an element in the center of $\mathcal {H}$.

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