English

The Taylor resolution over a skew polynomial ring

Rings and Algebras 2021-09-02 v1 Commutative Algebra Quantum Algebra

Abstract

Let k\Bbbk be a field and let II be a monomial ideal in the polynomial ring Q=k[x1,,xn]Q=\Bbbk[x_1,\ldots,x_n]. In her thesis, Taylor introduced a complex which provides a finite free resolution for Q/IQ/I as a QQ-module. Later, Gemeda constructed a differential graded structure on the Taylor resolution. More recently, Avramov showed that this differential graded algebra admits divided powers. We generalize each of these results to monomial ideals in a skew polynomial ring RR. Under the hypothesis that the skew commuting parameters defining RR are roots of unity, we prove as an application that as II varies among all ideals generated by a fixed number of monomials of degree at least two in RR, there is only a finite number of possibilities for the Poincar\'{e} series of k\Bbbk over R/IR/I and for the isomorphism classes of the homotopy Lie algebra of R/IR/I in cohomological degree larger or equal to two.

Keywords

Cite

@article{arxiv.2109.00111,
  title  = {The Taylor resolution over a skew polynomial ring},
  author = {Luigi Ferraro and Desiree Martin and W. Frank Moore},
  journal= {arXiv preprint arXiv:2109.00111},
  year   = {2021}
}
R2 v1 2026-06-24T05:34:48.975Z