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FREE PROFINITE SEMIGROUPS OVER SOME CLASSES OF SEMIGROUPS LOCALLY IN ${\mathcal D} {\rm G}$
- Source :
- International Journal of Algebra and Computation. 10:491-537
- Publication Year :
- 2000
- Publisher :
- World Scientific Pub Co Pte Lt, 2000.
-
Abstract
- This paper is concerned with the structure of semigroups of implicit operations on various subpseudovarieties V of [Formula: see text] ∩ [Formula: see text], where [Formula: see text] and [Formula: see text] are the pseudovarieties of all semigroups S in which each regular [Formula: see text] -class is, respectively, a rectangular group and a group, and where [Formula: see text] is the pseudovariety of semigroups locally in [Formula: see text] As an application, we give a characterization of the variety of languages recognized by semigroups in V and derive some join decompositions of pseudovarieties.
- Subjects :
- Krohn–Rhodes theory
Discrete mathematics
Pure mathematics
Group (mathematics)
Semigroup
Computer Science::Information Retrieval
General Mathematics
010102 general mathematics
Astrophysics::Instrumentation and Methods for Astrophysics
Structure (category theory)
Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing)
0102 computer and information sciences
Join (topology)
01 natural sciences
Mathematics::Group Theory
Regular language
010201 computation theory & mathematics
Computer Science::General Literature
Special classes of semigroups
0101 mathematics
Variety (universal algebra)
Mathematics
Subjects
Details
- ISSN :
- 17936500 and 02181967
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- International Journal of Algebra and Computation
- Accession number :
- edsair.doi...........71e84032d7b2a0db290b427f19107090