English

On function fields of curves over higher local fields and their division LFD-algebras

Number Theory 2025-07-08 v1 Rings and Algebras

Abstract

Let KmK _{m} be an mm-local field with an mm-th residue field K0K _{0}, for some integer m>0m > 0, and let K/KmK/K _{m} be a field extension of transcendence degree trd(K/Km)1(K/K _{m}) \le 1. This paper shows that if K0K _{0} is a field of finite Diophantine dimension (for example, a finitely-generated extension of a finite or a pseudo-algebraically closed perfect field EE), then the absolute Brauer pp-dimension abrdp(K)_{p}(K) of KK is finite, for every prime number pp. Thus it turns out that if RR is an associative locally finite-dimensional (abbr., LFD) central division KK-algebra, then it is a normally locally finite algebra over KK, that is, every nonempty finite subset YY of RR is contained in a finite-dimensional central KK-subalgebra RY\mathcal{R}_{Y} of RR.

Keywords

Cite

@article{arxiv.2507.04863,
  title  = {On function fields of curves over higher local fields and their division LFD-algebras},
  author = {Ivan D. Chipchakov},
  journal= {arXiv preprint arXiv:2507.04863},
  year   = {2025}
}

Comments

11 pages, no figures