On M-Varieties generated by Power Monoids.
S. Margolis (1981)
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S. Margolis (1981)
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F. Blanchet-Sadri (1993)
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S.L. Wismath (1986)
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Jean-Éric Pin, Howard Straubing (2005)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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In an earlier paper, the second author generalized Eilenberg’s variety theory by establishing a basic correspondence between certain classes of monoid morphisms and families of regular languages. We extend this theory in several directions. First, we prove a version of Reiterman’s theorem concerning the definition of varieties by identities, and illustrate this result by describing the identities associated with languages of the form , where are distinct letters. Next, we generalize...
S.L. Wismath (1993)
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Jean-Éric Pin, Howard Straubing (2010)
RAIRO - Theoretical Informatics and Applications
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In an earlier paper, the second author generalized Eilenberg's variety theory by establishing a basic correspondence between certain classes of monoid morphisms and families of regular languages. We extend this theory in several directions. First, we prove a version of Reiterman's theorem concerning the definition of varieties by identities, and illustrate this result by describing the identities associated with languages of the form , where are distinct letters....
P.R. Jones (1993)
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V.B. Lender (1993)
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Klaus Denecke, Rattana Srithus (2006)
Discussiones Mathematicae - General Algebra and Applications
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In this paper we consider different relations on the set P(V) of all proper hypersubstitutions with respect to a given variety V and their properties. Using these relations we introduce the cardinalities of the corresponding quotient sets as degrees and determine the properties of solid varieties having given degrees. Finally, for all varieties of bands we determine their degrees.