Autor:	Józef Dudek, Andrzej Kisielewicz
Rok vydání:	1991
Předmět:	Combinatorics Pure mathematics Polynomial Semigroup Binary number General Medicine Variety (universal algebra) Commutative property Word (group theory) Mathematics
Zdroj:	Journal of the Australian Mathematical Society. Series A. Pure Mathematics and Statistics. 51:381-399
ISSN:	0263-6115
DOI:	10.1017/s144678870003456x
Popis:	A semigroup is totally commutative if each of its essentially binary polynomials is commutative, or equivalently, if in every polynomial (word) every two essential variables commute. In the present paper we describe all varieties (equational classes) of totally commutative semigroups, lattices of subvarieties for any variety, and their free spectra.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dcd4d9a3266b29524d2ed3ce51aa2cb0 https://doi.org/10.1017/s144678870003456x Zobrazit plný text záznamu