On outer automorphisms of certain graph $C^{\ast }$-algebras

Swarnendu Datta, Debashish Goswami, Soumalya Joardar

Given a countable abelian group $A$, we construct a row finite directed graph $\Gamma (A)$ such that the $K_0$-group of the graph ${\text{C}}^{\ast }$-algebra ${\text{C}}^{\ast }(\Gamma (A))$…