2 papers
math.OA2026
An introduction to separated graphs and their type semigroups
Pere Ara
We introduce -algebras associated with directed graphs, along with two generalizations of this concept, namely Exel-Pardo -algebras associated with a self-similar action…
math.RA2025
The Leavitt inverse semigroup of a separated graph
Pere Ara, Alcides Buss, Ado Dalla Costa
We introduce and study a new inverse semigroup associated to a separated graph , which we call the \emph{Leavitt inverse semigroup}. This semigroup is obtained as a quotient…