A Structure Theorem and the Graded Betti Numbers for Almost Complete Intersections
Algebraic Geometry
2010-02-17 v1 Commutative Algebra
Abstract
We provide a structure theorem for all almost complete intersection ideals of depth three in any Noetherian local ring. In particular, we find that the minimal generators are the pfaffians of suitable submatrices of an alternating matrix. From the graded version of the previous result, we characterize the graded Betti numbers of all 3-codimensional almost complete intersection schemes of P^r.
Cite
@article{arxiv.1002.3026,
title = {A Structure Theorem and the Graded Betti Numbers for Almost Complete Intersections},
author = {Alfio Ragusa and Giuseppe Zappala},
journal= {arXiv preprint arXiv:1002.3026},
year = {2010}
}