ON BASES OF SOME SIMPLE MODULES OF SYMMETRIC GROUPS AND HECKE ALGEBRAS
ON BASES OF SOME SIMPLE MODULES OF SYMMETRIC GROUPS AND HECKE ALGEBRAS
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DOI:
10.1007/s00031-017-9444-7
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发表时间:
2017-10
影响因子:
0.7
通讯作者:
M. de Boeck;A. Evseev;S. Lyle;L. Speyer
中科院分区:
文献类型:
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作者:
M. de Boeck;A. Evseev;S. Lyle;L. Speyer
We consider simple modules for a Hecke algebra with a parameter of quantum characteristice. Equivalently, we consider simple modulesDλ, labelled bye-restricted partitions λ ofn, for a cyclotomic KLR algebraover a field of characteristicp≥ 0, with mild restrictions onp. If all parts of λ are at most 2, we identify a set DStde,p(λ) of standard λ-tableaux, which is defined combinatorially and naturally labels a basis ofDλ. In particular, we prove that theq-character ofDλcan be described in terms of DStde,p(λ). We show that a certain natural approach to constructing a basis of an arbitraryDλdoes not work in general, giving a counterexample to a conjecture of Mathas.