On the combinatorics of string polytopes
On the combinatorics of string polytopes
复制标题
弦多胞体的组合学
DOI:
10.1016/j.jcta.2021.105508
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发表时间:
2019
期刊:
影响因子:
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通讯作者:
Kyeong
中科院分区:
文献类型:
--
作者:
Yunhyung Cho;Yoosik Kim;Eunjeong Lee;Kyeong
For a reduced word i of the longest element in the Weyl group of SL n+ 1 (C), one can associate the string cone C i which parametrizes the dual canonical bases. In this paper, we classify all i's such that C i is simplicial. We also prove that for any regular dominant weight λ of sl n+ 1 (C), the corresponding string polytope Δ i (λ) is unimodularly equivalent to the Gelfand–Cetlin polytope associated to λ if and only if C i is simplicial. Thus we completely characterize Gelfand–Cetlin type string polytopes in terms of i.
DOI:
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发表时间:
2010
期刊:
影响因子:
--
作者:
Tanisaki;T.
通讯作者:
T.