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ON PSEUDOVARIETIES, VARIETIES OF LANGUAGES, FILTERS OF CONGRUENCES, PSEUDOIDENTITIES AND RELATED TOPICS

Title
ON PSEUDOVARIETIES, VARIETIES OF LANGUAGES, FILTERS OF CONGRUENCES, PSEUDOIDENTITIES AND RELATED TOPICS
Type
Article in International Scientific Journal
Year
1990
Authors
ALMEIDA, J
(Author)
FCUP
View Personal Page You do not have permissions to view the institutional email. Search for Participant Publications View Authenticus page Without ORCID
Journal
Title: Algebra UniversalisImported from Authenticus Search for Journal Publications
Vol. 27
Pages: 333-350
ISSN: 0002-5240
Publisher: Springer Nature
Scientific classification
FOS: Natural sciences > Mathematics
Other information
Authenticus ID: P-001-S19
Abstract (EN): In recent years there has been considerable interest in pseudovarieties, mainly in the theory of finite semigroups and monoids. However, several results on pseudovarieties apply to much more general finite algebraic structures. This note provides a systematic approach to various characterizations of pseudovarieties, some old, some new, most of them formulated in terms of isomorphisms with the lattice of pseudovarieties contained in a given pseudovariety. It clarifies the relationships between alternative descriptions of pseudovarieties and it characterizes those sets of pseudoidentities which are (deductively) closed. © 1990 Birkhÿuser Verlag.
Language: English
Type (Professor's evaluation): Scientific
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