On the insertion of n-powers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Almeida, J (Autor) FCUP; Klima, O (Autor) Outra

Revista

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Título: DISCRETE MATHEMATICS AND THEORETICAL COMPUTER SCIENCE

Vol. 21

ISSN: 1462-7264

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-00Q-BA6

Abstract (EN): In algebraic terms, the insertion of n-powers in words may be modelled at the language level by considering the pseudovariety of ordered monoids defined by the inequality 1 <= x(n). We compare this pseudovariety with several other natural pseudovarieties of ordered monoids and of monoids associated with the Burnside pseudovariety of groups defined by the identity x(n) = 1. In particular, we are interested in determining the pseudovariety of monoids that it generates, which can be viewed as the problem of determining the Boolean closure of the class of regular languages closed under n-power insertions. We exhibit a simple upper bound and show that it satisfies all pseudoidentities which are provable from 1 <= x(n) in which both sides are regular elements with respect to the upper bound.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 18