Commutative images of rational languages and the Abelian kernel of a monoid

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

delgado, m (Autor) FCUP

Revista

Título: RAIRO - Theoretical Informatics and Applications

Vol. 35

Páginas: 419-435

ISSN: 0988-3754

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 8 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências da computação e da informação

Outras Informações

ID Authenticus: P-000-TGN

DOI: 10.1051/ita:2001100

Abstract (EN): Natural algorithms to compute rational expressions for recognizable languages, even those which work well in practice, may produce very long expressions. So, aiming towards the computation of the commutative image of a recognizable language, one should avoid passing through an expression produced this way. We modify here one of those algorithms in order to compute directly a semilinear expression for the commutative image of a recognizable language. We also give a second modification of the algorithm which allows the direct computation of the closure in the profinite topology of the commutative image. As an application, we give a modification of an algorithm for computing the Abelian kernel of a finite monoid obtained by the author in 1998 which is much more efficient in practice.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 17