English

Noetherianity of polynomial rings up to group actions

Representation Theory 2025-08-25 v2 Commutative Algebra Rings and Algebras

Abstract

Let kk be a commutative Noetherian ring, and k[S]k[S] the polynomial ring whose indeterminates are parameterized by elements in a set SS. We show that k[S]k[S] is Noetherian up to highly homogenous actions of groups. In particular, there is a special linear order \leqslant on infinite SS such that k[S]k[S] is Noetherian up to actions of Aut(S,)\mathrm{Aut}(S, \leqslant), and the existence of such a linear order for every infinite set is equivalent to the axiom of choice. These Noetherian results are proved via a sheaf theoretic approach based on Artin's theorem, the work of Nagel-R\"{o}mer, and a classification of highly homogenous groups by Cameron.

Keywords

Cite

@article{arxiv.2502.14306,
  title  = {Noetherianity of polynomial rings up to group actions},
  author = {Liping Li and Yinhe Peng and Zhengjun Yuan},
  journal= {arXiv preprint arXiv:2502.14306},
  year   = {2025}
}

Comments

A major revision following reviewer's suggestions