Formulas are supplied for the type semigroup of C*-algebras arising from self-similar group actions on row-finite source-free graphs and from finite bipartite separated graphs.
Wehrung,Embedding simple commutative monoids into simple refinement monoids Semigroup Forum56(1998), 104–129
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An introduction to separated graphs and their type semigroups
Formulas are supplied for the type semigroup of C*-algebras arising from self-similar group actions on row-finite source-free graphs and from finite bipartite separated graphs.