Morita equivalences of Ariki–Koike algebras

Morita equivalences of Ariki–Koike algebras
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DOI:
10.1007/s002090100371
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发表时间:
2000-04
影响因子:
0.8
通讯作者:
R. Dipper;Andrew Mathas
R. Dipper;Andrew Mathas
中科院分区:
数学2区
文献类型:
--
作者:
R. Dipper;Andrew Mathas

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我们证明了每个Ariki-Koike代数都是Morita等价于具有q-连通参数集的较小的Ariki-Koike代数的张量积的直和。对于分圆q-Schur代数,也证明了类似的结果。结合我们的结果和Ariki和Uglov的工作,定义在特征零域上的Ariki-Koike代数的分解数现在原则上是已知的。
We prove that every Ariki–Koike algebra is Morita equivalent to a direct sum of tensor products of smaller Ariki–Koike algebras which haveq–connected parameter sets. A similar result is proved for the cyclotomicq–Schur algebras. Combining our results with work of Ariki and Uglov, the decomposition numbers for the Ariki–Koike algebras defined over fields of characteristic zero are now known in principle.