Combinatorics of Generalized Exponents
Combinatorics of Generalized Exponents
复制标题
广义指数的组合
DOI:
10.1093/imrn/rny157
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发表时间:
2018
影响因子:
1
通讯作者:
Lenart, Cristian
中科院分区:
文献类型:
--
作者:
Lecouvey, Cédric;Lenart, Cristian
We give a purely combinatorial proof of the positivity of the stabilized forms of the generalized exponents associated to each classical root system. In finite type, we rederive the description of the generalized exponents in terms of crystal graphs without using the combinatorics of semistandard tableaux or the charge statistic. In finite type, we obtain a combinatorial description of the generalized exponents based on the so-called distinguished vertices in crystals of type, which we also connect to symplectic King tableaux. This gives a combinatorial proof of the positivity of Lusztig-analogs associated to zero-weight spaces in the irreducible representations of symplectic Lie algebras. We also present three applications of our combinatorial formula and discuss some implications to relating two typebranching rules. Our methods are expected to extend to the orthogonal types.
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DOI:
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发表时间:
1976
期刊:
影响因子:
--
作者:
R. King
通讯作者:
R. King
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
B. Ion
通讯作者:
B. Ion
DOI:
--
发表时间:
1963
期刊:
影响因子:
--
作者:
A. Morris
通讯作者:
A. Morris
影响因子:
1.7
作者:
K. Koike;I. Terada
通讯作者:
I. Terada
DOI:
10.1007/s000290050020
发表时间:
1995
期刊:
Selecta Mathematica
影响因子:
--
作者:
A. Nakayashiki;Y. Yamada
通讯作者:
Y. Yamada