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BERNSTEIN–SATO ROOTS FOR MONOMIAL IDEALS IN POSITIVE CHARACTERISTIC

Part of: (Co)homology theory General commutative ring theory

Published online by Cambridge University Press:  20 March 2020

EAMON QUINLAN-GALLEGO Open the ORCID record for EAMON QUINLAN-GALLEGO [Opens in a new window]
EAMON QUINLAN-GALLEGO*
Affiliation:
Department of Mathematics, East Hall, 530 Church Street, 48109Ann Arbor, MI, USA email equinlan@umich.edu
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Abstract

Following the work of Mustaţă and Bitoun, we recently developed a notion of Bernstein–Sato roots for arbitrary ideals, which is a prime characteristic analogue for the roots of the Bernstein–Sato polynomial. Here, we prove that for monomial ideals the roots of the Bernstein–Sato polynomial (over $\mathbb{C}$) agree with the Bernstein–Sato roots of the mod $p$ reductions of the ideal for $p$ large enough. We regard this as evidence that the characteristic-$p$ notion of Bernstein–Sato root is reasonable.

MSC classification

Primary: 13A35: Characteristic $p$ methods (Frobenius endomorphism) and reduction to characteristic $p$; tight closure
Secondary: 14F10: Differentials and other special sheaves; D-modules; Bernstein-Sato ideals and polynomials
Type
Article
Information
Nagoya Mathematical Journal , Volume 244 , December 2021 , pp. 25 - 34
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Copyright
© 2020 Foundation Nagoya Mathematical Journal

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Footnotes

Partially supported by the National Science Foundation grant DMS-1801697 and by the Ito Foundation for International Education Exchange.

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