English

Canonical Hilbert-Burch matrices for power series

Commutative Algebra 2021-05-05 v2 Algebraic Geometry

Abstract

Sets of zero-dimensional ideals in the polynomial ring k[x,y]k[x,y] that share the same leading term ideal with respect to a given term ordering are known to be affine spaces called Gr\"obner cells. Conca-Valla and Constantinescu parametrize such Gr\"obner cells in terms of certain canonical Hilbert-Burch matrices for the lexicographical and degree-lexicographical term orderings, respectively. In this paper, we give a parametrization of (x,y)(x,y)-primary ideals in Gr\"obner cells which is compatible with the local structure of such ideals. More precisely, we extend previous results to the local setting by defining a notion of canonical Hilbert-Burch matrices of zero-dimensional ideals in the power series ring k[[x,y]]k[[x,y]] with a given leading term ideal with respect to a local term ordering.

Keywords

Cite

@article{arxiv.2004.04776,
  title  = {Canonical Hilbert-Burch matrices for power series},
  author = {Roser Homs and Anna-Lena Winz},
  journal= {arXiv preprint arXiv:2004.04776},
  year   = {2021}
}

Comments

To appear in Journal of Algebra

R2 v1 2026-06-23T14:46:11.853Z