F-modules: applications to local cohomology and D-modules in characteristic p>0.
F-modules: applications to local cohomology and D-modules in characteristic p>0.
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F 模:应用于局部上同调和特征 p>0 的 D 模。
DOI:
10.1515/crll.1997.491.65
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
G. Lyubeznik
中科院分区:
文献类型:
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作者:
G. Lyubeznik
Let F: Ä-mod -* Ä-mod be the Frobenius functor of Peskine-Szpiro [PSz], 1.1.2. An F-module, or, more accurately, an FÄ-module is a pair (Jt, 0), where M is an Ä-module and : M » F ( J f ) is an -module isomorphism. F-modules form an abelian category (Definition 1.1). It should be noted that our notion of F-module is, in a sense, dual to the notion of level (R, F)-module of Hartshorne-Speiser [HaSp], Sec.l. It has been known that local cohomology modules of R with support in any ideal / c R have the property that they are isomorphic to their own images under the Frobenius functor and this fact has been used, for example, by Hartshorne-Speiser [HaSp], Huneke-Sharp [HuSh], Peskine-Szpiro [PSz] and Sharp [Sh] to study local cohomology, but a systematic theory of modules having this property has not been constructed. One of our main goals in this paper is to develop such a theory.