有限群概型的内平凡模
Endotrivial Modules for Finite Group Schemes
摘要:
众所周知,如果G是有限群,则其核平凡模群是核平凡生成的.本文研究了任意有限群上的endovarious模。我们的结果可用于计算几类无穷小群方案的内涵群,这些无穷小群方案包括抛物子群的Frobenius核及其幂幺根(对于约化代数群).对于G的可约化,我们还给出了G的Frobenius核G_r上的简单、诱导/Weyl和倾斜模(G-模)的分类.
英文摘要:
It is well known that if G is a finite group then the group of endotrivial modules is finitely generated. In this paper we investigate endotrivial modules over arbitrary finite group schemes. Our results can be applied to computing the endotrivial group for several classes of infinitesimal group schemes which include the Frobenius kernels of parabolic subgroups, and their unipotent radicals(for reductive algebraic groups). For G reductive, we also present a classification of simple, induced/Weyl and tilting modules (G-modules) which are endotrivial over the Frobenius kernel G_r of G.
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