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Modules with finite F-representation type

机译:具有有限F表示类型的模块

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摘要

Finitely generated modules with finite F-representation type over Noetherian (local) rings of prime characteristic p are studied. If a ring R has finite F-representation type or, more generally, if a faithful R-module has finite F-representation type, then tight closure commutes with localizations over R. F-contributors are also defined, and they are used as an effective way of characterizing tight closure. Then it is shown that lim(e ->infinity) (# (M-e, M-i) / (ap(d))(e)) always exists under the assumption that (R, m) satisfies the Krull-Schmidt condition and M has finite F-representation type by {M-1, M-2,..., M-s}, in which all the M-i are indecomposable R-modules that belong to distinct isomorphism classes and a = [R/m: (R/m)(p)].
机译:研究了主要特征为p的Noetherian(局部)环上有限F表示类型的有限生成模块。如果环R具有有限的F-表示类型,或更普遍地,如果一个忠实的R-模块具有有限的F-表示类型,则紧闭闭环与R上的局部化交换.F贡献者也被定义为F表示形式。表征紧密闭合的有效方法。然后证明lim(e-> infinity)(#(Me,Mi)/(ap(d))(e))在(R,m)满足Krull-Schmidt条件且M满足由{M-1,M-2,...,Ms}表示的有限F表示类型,其中所有Mi都是不可分解的R模块,它们属于不同的同构类,并且a = [R / m:(R / m )(p)]。

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