English

Skew Laurent Series Ring Over a Dedekind Domain

Rings and Algebras 2025-10-10 v2

Abstract

We show that the formal skew Laurent series ring R=D( ⁣(x;σ) ⁣)R = D(\! ( x; \sigma )\! ) over a commutative Dedekind domain DD with an automorphism σ\sigma is a noncommutative Dedekind domain. If σ\sigma acts trivially on the ideal class group of DD, then K0(R)K_0(R), the Grothendieck group of RR, is isomorphic to K0(D)K_0(D). Furthermore, we determine the Krull dimension, the global dimension, the general linear rank, and the stable rank of RR.

Keywords

Cite

@article{arxiv.2412.09515,
  title  = {Skew Laurent Series Ring Over a Dedekind Domain},
  author = {Daniel Vitas},
  journal= {arXiv preprint arXiv:2412.09515},
  year   = {2025}
}

Comments

20 pages