Semiassociative algebras over a field
Rings and Algebras
2023-12-11 v2
Abstract
An associative central simple algebra is a form of matrices, because a maximal \'{e}tale subalgebra acts on the algebra faithfully by left and right multiplication. In an attempt to extract and isolate the full potential of this point of view, we study nonassociative algebras whose nucleus contains an \'{e}tale subalgebra bi-acting faithfully on the algebra. These algebras, termed semiassociative, are shown to be the forms of skew matrices, which we are led to define and investigate. Semiassociative algebras modulo skew matrices compose a Brauer monoid, which contains the Brauer group of the field as a unique maximal subgroup.
Cite
@article{arxiv.2308.14653,
title = {Semiassociative algebras over a field},
author = {Guy Blachar and Darrell Haile and Eliyahu Matzri and Edan Rein and Uzi Vishne},
journal= {arXiv preprint arXiv:2308.14653},
year = {2023}
}
Comments
50 pages, 1 figure