THE LOEWY SERIES OF AN FCP (DISTRIBUTIVE) RING EXTENSION

Year 2021, , 15 - 49, 05.01.2021

Gabriel Pıcavet Martine Pıcavet-l'hermıtte

https://doi.org/10.24330/ieja.851985

Cited By: 2

Abstract

If $R\subseteq S$ is an extension of commutative rings, we consider the lattice $([R,S],\subseteq)$ of all the $R$-subalgebras of $S$.
We assume that the poset $[R,S]$ is both Artinian and Noetherian; that is, $R\subseteq S$ is an FCP extension.
The Loewy series of such lattices are studied. Most of main results are gotten in case these posets are distributive,
which occurs for integrally closed extensions. In general, the situation is much more complicated. We give a discussion for finite field extensions.

Keywords

FIP, FCP extension, minimal extension, support of a module, distributive lattice, Boolean lattice, atom, socle, Loewy series, Galois extension

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