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Publication details
A classification of rational languages by semilattice-ordered monoids
Authors | |
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Year of publication | 2004 |
Type | Article in Periodical |
Magazine / Source | Archivum Mathematicum |
MU Faculty or unit | |
Citation | |
Field | General mathematics |
Keywords | syntactic semilattice-ordered monoid; conjunctive variety of languages |
Description | We prove here an Eilenberg type theorem: the so-called conjunctive varieties of rational languages correspond to the pseudovarieties of finite semilattice-ordered monoids.Taking complements of members of a conjunctive variety of languages we get a so-called disjunctive variety. We present here a non-trivial example of such a variety together with an equational characterization of the corresponding pseudovariety. |
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