@UNPUBLISHED{publication1, title = "Symbolic dynamics and semigroup theory", author = "{COSTA, Alfredo}", year = "2018-11-09", abstract = " The correspondence X \→ B(X), associating to each symbolic dynamical system X the formal language B(X) of its blocks, entails a connection between symbolic dynamics and semigroup theory. In this article we survey some developments on this connection. ", url = "http://www.mat.uc.pt/preprints/eng\_2018.html", note = "" }