English

Differential graded algebras with divided powers and homotopy Lie algebras

Representation Theory 2026-02-10 v3 Commutative Algebra

Abstract

Given a commutative algebra AA and a quotient AA-algebra A/IA/I, we construct a resolution of A/IA/I as an AA-module such that it is also a differential graded (dg) algebra with divided powers (PD). This construction makes use of symmetric tensors in the symmetric tensor category of dg AA-modules and does not require a Noetherian assumption on AA. Moreover, the resolution has many lifting properties which we leverage to study the homotopy Lie algebra associated to the pair (A,A/I)(A,A/I), which is defined as the cohomology of the PD derivations of this PD dg algebra. Finally we investigate the complete intersection case in more details as well as connect it to the finite generation of the Yoneda algebra.

Keywords

Cite

@article{arxiv.2511.22614,
  title  = {Differential graded algebras with divided powers and homotopy Lie algebras},
  author = {Antoine Caradot and Zongzhu Lin},
  journal= {arXiv preprint arXiv:2511.22614},
  year   = {2026}
}

Comments

46 pages. Fixed typos in Proposition 4.7 and its proof