Articles producció científica> Filologies Romàniques

Contextual partial commutations

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    Identifier: imarina:9048008
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    Papper version: info:eu-repo/semantics/publishedVersion
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    Department: Filologies Romàniques
    URV's Author/s: Choffrut, Christian; Mercas, Robert
    Abstract: We consider the monoid T with the presentation < a, b; aab = aba > which is ''close'' to trace monoids. We prove two different types of results. First, we give a combinatorial description of the lexicographically minimum and maximum representatives of their congruence classes in the free monoid \a, b\* and solve the classical equations, such as commutation and conjugacy in T. Then we study the closure properties of the two subfamilies of the rational subsets of T whose lexicographically minimum and maximum cross-sections respectively, are rational in \a, b\*.
    Journal publication year: 2010
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    First page: 59
    Record's date: 05/02/2021
    Last page: 72
    Journal volume: 12