English

The Golod property for Stanley-Reisner rings in varying characteristic

Commutative Algebra 2016-06-07 v3 Combinatorics

Abstract

We show that the Golod property of a Stanley-Reisner ring can depend on the characteristic of the base field. More precisely, for every finite set TT of prime numbers we construct simplicial complexes Δ\Delta and Γ\Gamma, such that K[Δ]\mathbb{K}[\Delta] is Golod exactly in the characteristics in TT and K[Γ]\mathbb{K}[\Gamma] is Golod exactly in the characteristics not in TT. Along the way, we show that a one-dimensional simplicial complex is Golod if and only if it is chordal.

Keywords

Cite

@article{arxiv.1504.05037,
  title  = {The Golod property for Stanley-Reisner rings in varying characteristic},
  author = {Lukas Katthän},
  journal= {arXiv preprint arXiv:1504.05037},
  year   = {2016}
}

Comments

13 pages. Minor corrections, one simplified proof. To appear in J. Pure and applied Alg