We prove that the F-jumping coefficients of a principal ideal of an excellent regular local ring of characteristic p > 0 are all rational and form a discrete subset of R.
Bibliographical noteFunding Information:
✩ The first author wishes to thank the Institute of Mathematics and its Applications at the University of Minnesota for support during his stay. The second and third authors gratefully acknowledge NSF support through grant DMS-0202176. * Corresponding author. E-mail addresses: firstname.lastname@example.org (M. Katzman), email@example.com (G. Lyubeznik), firstname.lastname@example.org, email@example.com (W. Zhang). 1 Current address: Department of Mathematics, University of Michigan, Ann Arbor, MI 48109, USA.
- Actions of the Frobenius
- Characteristic p
- Excellent rings
- F-jumping coefficients
- Generalized test ideals
- Regular rings