Test ideals via algebras of $p^{-e}$-linear maps
Test ideals via algebras of $p^{-e}$-linear maps
复制标题
通过 $p^{-e}$-线性映射的代数测试理想
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
Manuel Blickle
中科院分区:
文献类型:
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作者:
Manuel Blickle
Continuing ideas of a recent preprint of Schwede arXiv:0906.4313 we study test ideals by viewing them as minimal objects in a certain class of $F$-pure modules over algebras of p^{-e}-linear operators. This shift in the viewpoint leads to a simplified and generalized treatment, also allowing us to define test ideals in non-reduced settings.
In combining this with an observation of Anderson on the contracting property of p^{-e}-linear operators we obtain an elementary approach to test ideals in the case of affine k-algebras, where k is an F-finite field. It also yields a short and completely elementary proof of the discreteness of their jumping numbers extending most cases where the discreteness of jumping numbers was shown in arXiv:0906.4679.
DOI:
10.1090/s0002-9939-10-10336-0
发表时间:
2009-06
期刊:
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影响因子:
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作者:
Mordechai Katzman
通讯作者:
Mordechai Katzman