Veronese subrings and tight closure

Anurag K. Singh

Vol. 192 (2000), No. 2, 399–413

DOI: 10.2140/pjm.2000.192.399

Abstract

We determine when an ℕ-graded ring has Veronese subrings which are F-rational or F-regular. The results obtained here give a better understanding of these properties, and include various techniques of constructing F-rational rings which are not F-regular.

Milestones

Received: 23 June 1998

Revised: 23 October 1998

Published: 1 February 2000