English

Absolutely $lq$-finite extension

Commutative Algebra 2017-01-20 v1

Abstract

Let K/k be purely inseparable extension of characteristic p \textgreater{} 0. By invariants, we characterize the measure of the size of K/k. In particular, we give a necessary and sufficient condition that K/k is of bounded size. Furthermore, in this note, we continue to be interested in the relationship that connects the restricted distribution of finitude at the local level of intermediate fields of a purely inseparable extension K/k to the absolute or global finitude of K/k. Part of this problem was treated successively by J.K Devney, and in my work with M. Chellali. The other part is the subject of this paper, it is a question of describing the absolutely lq-finite extensions. Among others, any absolutely lq-finite extension decomposes into w0-generated extensions. However, we construct an example of extension of infinite size such that for any intermediate field L of K/k, L is of finite size over k. In addition, K/k does not respect the distribution of horizontal finitude.

Keywords

Cite

@article{arxiv.1701.05430,
  title  = {Absolutely $lq$-finite extension},
  author = {El Hassane Fliouet},
  journal= {arXiv preprint arXiv:1701.05430},
  year   = {2017}
}

Comments

53 page, in French

R2 v1 2026-06-22T17:54:11.699Z