Nagoya Mathematical Journal

Estimates for F-jumping numbers and bounds for Hartshorne–Speiser–Lyubeznik numbers

Mircea Mustaţă and Wenliang Zhang

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Given an ideal a on a smooth variety in characteristic zero, we estimate the F-jumping numbers of the reductions of a to positive characteristic in terms of the jumping numbers of a and the characteristic. We apply one of our estimates to bound the Hartshorne–Speiser–Lyubeznik invariant for the reduction to positive characteristic of a hypersurface singularity.

Article information

Nagoya Math. J., Volume 210 (2013), 133-160.

First available in Project Euclid: 20 May 2013

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Zentralblatt MATH identifier

Primary: 13A35: Characteristic p methods (Frobenius endomorphism) and reduction to characteristic p; tight closure [See also 13B22]
Secondary: 14B15: Local cohomology [See also 13D45, 32C36] 14F18: Multiplier ideals


Mustaţă, Mircea; Zhang, Wenliang. Estimates for $F$ -jumping numbers and bounds for Hartshorne–Speiser–Lyubeznik numbers. Nagoya Math. J. 210 (2013), 133--160. doi:10.1215/00277630-2077035.

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