English

Boij-Soderberg theory for ideals generated by degree 2

Commutative Algebra 2019-12-17 v2

Abstract

In Boij-Soderberg theory, it is known that for any degree sequence d\mathbf{d}, there exists a finitely generated module that has a pure resolution of type d\mathbf{d}. On the other hand, in the case of ideal, there are two necessary conditions for the degree sequence, which d\mathbf{d} satisfies them if there is an ideal that has a pure resolution of type d\mathbf{d}. In this paper, by theory of generic initial ideals and Boij-Soderberg decompositions, we construct the degree sequence which satisfies these conditions but there is no such an ideal.

Keywords

Cite

@article{arxiv.1912.04036,
  title  = {Boij-Soderberg theory for ideals generated by degree 2},
  author = {Hiroju Kanno},
  journal= {arXiv preprint arXiv:1912.04036},
  year   = {2019}
}

Comments

14 pages, Main result has already been known

R2 v1 2026-06-23T12:39:59.109Z