Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5778305 | Advances in Mathematics | 2017 | 28 Pages |
Abstract
We study the structure of D-modules over a ring R which is a direct summand of a polynomial or a power series ring S with coefficients over a field. We relate properties of D-modules over R to D-modules over S. We show that the localization Rf and the local cohomology module HIi(R) have finite length as D-modules over R. Furthermore, we show the existence of the Bernstein-Sato polynomial for elements in R. In positive characteristic, we use this relation between D-modules over R and S to show that the set of F-jumping numbers of an ideal IâR is contained in the set of F-jumping numbers of its extension in S. As a consequence, the F-jumping numbers of I in R form a discrete set of rational numbers. We also relate the Bernstein-Sato polynomial in R with the F-thresholds and the F-jumping numbers in R.
Keywords
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Physical Sciences and Engineering
Mathematics
Mathematics (General)
Authors
Josep Ãlvarez Montaner, Craig Huneke, Luis Núñez-Betancourt,