Title
Numerically deciding the arithmetically Cohen-Macaulayness of a projective scheme
Abstract
In numerical algebraic geometry, a witness point set W is a key object for performing numerical computations on a projective scheme X of pure dimension d 0 defined over C . If X is arithmetically Cohen-Macaulay, W can also be used to obtain information about X, such as the initial degree of the ideal generated by X and its Castelnuovo-Mumford regularity. Due to this relationship, we develop a new numerical algebraic geometric test for deciding if X is arithmetically Cohen-Macaulay using points which lie (approximately) on a general curve section C of X. For any curve, we also compute other information such as the arithmetic genus and index of regularity. Several examples are presented showing the effectiveness of this method, even when the ideal of X is unknown.
Year
DOI
Venue
2016
10.1016/j.jsc.2015.01.001
Journal of Symbolic Computation
Keywords
Field
DocType
primary,secondary
Discrete mathematics,Algebraic geometric,Arithmetic genus,Numerical algebraic geometry,Point set,Witness set,Castelnuovo–Mumford regularity,Mathematics,Projective test,Computation
Journal
Volume
Issue
ISSN
72
C
0747-7171
Citations 
PageRank 
References 
1
0.37
5
Authors
2
Name
Order
Citations
PageRank
Noah S. Daleo110.37
Jonathan D. Hauenstein226937.65