Dual F-signature
Commutative Algebra
2013-07-02 v2 Algebraic Geometry
Abstract
We define the dual F-signature of modules, which is equivalent to the F-signature if the module is the base ring. By using this invariant, We give characterizations of regular, F-regular, F-rational, and Gorenstein singularities.
Cite
@article{arxiv.1301.2381,
title = {Dual F-signature},
author = {Akiyoshi Sannai},
journal= {arXiv preprint arXiv:1301.2381},
year = {2013}
}
Comments
Typos corrected and other minor changes. To appear in International Mathematics Research Notices