77 citations · 154 across the 22 of their papers we have counts for
4 papers · 1 filter
Stone pseudovarieties
Jorge Almeida, Ondřej Klíma
Profinite algebras are the residually finite compact algebras; their underlying topological spaces are Stone spaces. We extend the theory of profinite algebras to a more general se…
Locally countable pseudovarieties
Jorge Almeida, Ondrej Klíma
The purpose of this paper is to contribute to the theory of profinite semigroups by considering the special class consisting of those all of whose finitely generated closed subsemi…
Recognizing pro-R closures of regular languages
Jorge Almeida, José Carlos Costa, Marc Zeitoun
Given a regular language L, we effectively construct a unary semigroup that recognizes the topological closure of L in the free unary semigroup relative to the variety of unary sem…
Binary patterns in the Prouhet-Thue-Morse sequence
Jorge Almeida, Ondřej Klíma
We show that, with the exception of the words and , all (finite or infinite) binary patterns in the Prouhet-Thue-Morse sequence can actually be found in that seq…