On varieties of semilattice-ordered semigroups

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Authors	POLÁK Libor KUŘIL Martin
Year of publication	2005
Type	Article in Periodical
Magazine / Source	Semigroup Forum
MU Faculty or unit	Faculty of Science
Citation
Field	General mathematics
Keywords	variety; semilattice-ordered semigroup; admissible closusure operator
Description	We iniciate here a systematic equational classification of semilattice-ordered semigroups. We start with various examples. Then we consider semilattice-ordered semigroups satisfying the identity x^r=x. Finally, we reduce the classification to finding certain operators on relatively free semigroups.
Related projects:	Mathematical structures of algebra and geometry