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arXiv 0903.0409math.RT
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某些Specht模的簇

The varieties for some Specht modules

Kay Jin Lim

摘要:

我们关注的VIGRE猜想,即一个Specht模块的复杂性是相应的分区的p-重量当且仅当分区不是p由p。在阿贝尔亏损的情况下,我们计算的Specht模块的上同调品种。特别是,我们表明,Specht模块的复杂性,正是由相应的分区的p-权重。对于不超过p个部分且p-核为空的p-正则划分,我们证明了Specht模符合猜想.对于划分p^p,我们证明了Specht模的复杂度为p-1,并研究了限制于秩为p的极大初等交换p-子群的Specht模的秩簇.

英文摘要:

We concern the VIGRE's conjecture; namely the complexity of a Specht module is the p-weight of the corresponding partition if and only if the partition is not p by p. In abelian defect case, we calculate the cohomological variety of the Specht modules. In particular, we show that the Specht modules have complexities exactly given by the p-weights of the corresponding partitions. For some p-regular partitions not more than p parts with empty p-core, we show that the Specht modules fit into the conjecture. For the partition p^p, we show that the Specht module has complexity p-1 and we study the rank variety of the Specht module restricted to a maximal elementary abelian p-subgroup of rank p.

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