A-nuclei and A-centers of a quasigroup
Group Theory
2011-02-18 v1
Abstract
A-nuclei (groups of regular permutations) of a quasigroup are studied. A quasigroup is A-nuclear if and only if it is group isotope. Any quasigroup with permutation medial or paramedial identity is an abelian group isotope. Definition of A-center of a quasigroup is given. A quasigroup is A-central if and only if it is abelian group isotope. If a quasigroup is central in Belyavskaya-Smith sense, then it is A-central. Conditions when A-nucleus define normal congruence of a quasigroup are established, conditions normality of nuclei of some inverse quasigroups are given. Notice, definition of A-nucleus of a loop and A-center of a loop coincides, in fact, with corresponding standard definition.
Keywords
Cite
@article{arxiv.1102.3525,
title = {A-nuclei and A-centers of a quasigroup},
author = {V. A. Shcherbacov},
journal= {arXiv preprint arXiv:1102.3525},
year = {2011}
}
Comments
55 pages