Demazure flags, q-Fibonacci polynomials and hypergeometric series
Demazure flags, q-Fibonacci polynomials and hypergeometric series
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Demazure 旗形、q-斐波那契多项式和超几何级数
DOI:
10.1007/s40687-018-0129-1
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发表时间:
2018
影响因子:
1.2
通讯作者:
Kus, Deniz
中科院分区:
文献类型:
--
作者:
Biswal, Rekha;Chari, Vyjayanthi;Kus, Deniz
We study a family of finite-dimensional representations of the hyperspecial parabolic subalgebra of the twisted affine Lie algebra of type. We prove that these modules admit a decreasing filtration whose sections are isomorphic to stable Demazure modules in an integrable highest weight module of sufficiently large level. In particular, we show that any stable levelDemazure module admits a filtration by levelmDemazure modules for all. We define the graded and weighted generating functions which encode the multiplicity of a given Demazure module and establish a recursive formulae. In the case whenand, we determine these generating functions completely and show that they define hypergeometric series and that they are related to theq-Fibonacci polynomials defined by Carlitz.
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