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El Hassane Fliouet

Publications and source records attributed to El Hassane Fliouet.

2 recordsLinked to original sources

$+\infty$-$w\_0$-generated field extensions

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 $K/k$. In "{\it $w\_0$-generated field extensions,}Arch. Math. {\bf 47}, (1986), 410-412", JK Deveney constructed an example of modular extension $K/k$ called $w\_0 $-generated such that for any proper subfield $L$ of $K/k $, $L$ is finite over $k$, and for every $ n \in {\mathbf N}$, we have $ [k^{p^{- n}} \cap K: k] = p^{2n} $. This example has proved to be extremely useful in the construction of other examples of $w\_0$-generated extensions. In particular, we prolong the $w\_0$-generated to an extension of unspecified finite size.However, when $K/k$ is of unbounded size, we show that any modular extension of unbounded exponent admits a proper subextension of unbounded exponent. This brings us to study the $w\_0$-generated in the restricted sense. In addition, with the aim of extending the $w\_0$-generated to a purely inseparable extension of unbounded size, we propose other generalizations.

math.AC↗

Absolutely $lq$-finite extension

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.

math.AC↗