K-theory for the simple $C^*$-algebra of the Fibonacchi Dyck system

Abstract

Let $F$ be the Fibonacci matrix $ \bigl[\begin{smallmatrix} 1 & 1 1 & 0 \\ \end{smallmatrix}\bigr] $. The Fibonacci Dyck shift is a subshsystem of the Dyck shift $D_2$ constrained by the matrix $F$. Let ${{\frak L}^{Ch(D_F)}}$ be a $λ$-graph system presenting the subshift $D_F$, that is called the Cantor horizon $λ$-graph system for $D_F$. We will study the $C^*$-algebra ${\cal O}_{{\frak L}^{Ch(D_F)}}$ associated with $ {{\frak L}^{Ch(D_F)}} $. It is simple purely infinite and generated by four partial isometries with some operator relations. We will compute the K-theory of the $C^*$-algebra. As a result, the $C^*$-algebra is simple purely infinite and not semiprojective. Hence it is not stably isomorphic to any Cuntz-Krieger algebra.