English

Mapping cones of monomial ideals over exterior algebras

Commutative Algebra 2024-05-14 v2

Abstract

Let KK be a field, VV a finite dimensional KK-vector space and EE the exterior algebra of VV. We analyze iterated mapping cone over EE. If II is a monomial ideal of EE with linear quotients, we show that the mapping cone construction yields a minimal graded free resolution FF of II via the Cartan complex. Moreover, we provide an explicit description of the differentials in FF when the ideal II has a regular decomposition function. Finally, we get a formula for the graded Betti numbers of a new class of monomial ideals including the class of strongly stable ideals.

Keywords

Cite

@article{arxiv.2303.06953,
  title  = {Mapping cones of monomial ideals over exterior algebras},
  author = {Marilena Crupi and Antonino Ficarra and Ernesto Lax},
  journal= {arXiv preprint arXiv:2303.06953},
  year   = {2024}
}

Comments

This is the final version of our paper, published in Communications in Algebra