logo_acta

Acta Mathematica Vietnamica

Absolutely lq-Finite Extensions

icon-email El Hassane Fliouet

Abstract

We describe the lower quasi-finite extensions K/k of characteristic p>0, which are defined as follows: for every nN,kpnK/k is finite. We are especially interested in examining the absolute case. In this regard, we give necessary and sufficient condition for an absolutely lq-finite extension to be of finite size. Moreover, we show that any extension that is at the same time modular and lq-finite is of finite size. Furthermore, we construct an example of extension K/k of infinite size such that for any intermediate field L of K/k is of finite size over k.