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math.DS2018
Symbolic dynamics and semigroup theory
Alfredo Costa
A major motivation for the development of semigroup theory was, and still is, its applications to the study of formal languages. Therefore, it is not surprising that the correspond…
math.GR2018
Profinite topologies
Jorge Almeida, Alfredo Costa
Profinite semigroups are a generalization of finite semigroups that come about naturally when one is interested in considering free structures with respect to classes of finite sem…