Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8896516 | Journal of Algebra | 2018 | 37 Pages |
Abstract
Let X be a variety over a field k and let Xâ be its space of arcs. Let PE be the stable point of Xâ defined by a divisorial valuation νE on X. Assuming char k=0, if X is smooth at the center of PE, we make a study of the graded algebra associated to νE and define a finite set whose elements generate a localization of the graded algebra modulo étale covering. This provides an explicit description of a minimal system of generators of the local ring OXâ,PE. If X is singular, we obtain generators of PE/PE2 and conclude that embdimO(Xâ)red,PE=embdimOXâ,PEËâ¤kËE+1 where kËE is the Mather discrepancy of X with respect to νE. This provides algebraic tools for explicit computations of the local rings OXâ,PEË.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Ana J. Reguera,