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arXiv 0706.0604math.RTmath.AG
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具有Schur滤子的代数上模的有限Schur滤子维数

Finite Schur filtration dimension for modules over an algebra with Schur filtration

Vasudevan Srinivas, Wilberd van der Kallen

摘要:

设G是GL_N或SL_N,G是正特征p的域k上的约化线性代数群,我们证明了仅当N2 ^N时的几个结果< 6 or p >.设G有理地作用在一个n-生成的交换k-代数A上。假设A作为G-模有一个好滤子或Schur滤子。设M是具有相容G作用的Noether A-模。则M有有限的good/Schur滤维数,使得至多有n个非零H^i(G,M)。此外,这些H^i(G,M)是不变量环A^G上的Noether模。我们的主要工具是一个决议涉及舒尔函子的理想的对角线的产品格拉斯曼。

英文摘要:

Let G be GL_N or SL_N as reductive linear algebraic group over a field k of positive characteristic p. We prove several results that were previously established only when N < 6 or p > 2^N. Let G act rationally on a finitely generated commutative k-algebra A. Assume that A as a G-module has a good filtration or a Schur filtration. Let M be a noetherian A-module with compatible G action. Then M has finite good/Schur filtration dimension, so that there are at most finitely many nonzero H^i(G,M). Moreover these H^i(G,M) are noetherian modules over the ring of invariants A^G. Our main tool is a resolution involving Schur functors of the ideal of the diagonal in a product of Grassmannians.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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