# Aperiodicity and the primitive ideal space of a row-finite \$k\$-graph \$C^*\$-algebra

Journal Article

### Abstract

• We describe the primitive ideal space of the \$C^{\ast}\$-algebra of a

row-finite \$k\$-graph with no sources when every ideal is gauge invariant. We

characterize which spectral spaces can occur, and compute the primitive ideal

space of two examples. In order to do this we prove some new results on

aperiodicity. Our computations indicate that when every ideal is gauge

invariant, the primitive ideal space only depends on the 1-skeleton of the

\$k\$-graph in question.

• 2011

### Abstract

• We describe the primitive ideal space of the \$C^{\ast}\$-algebra of a

row-finite \$k\$-graph with no sources when every ideal is gauge invariant. We

characterize which spectral spaces can occur, and compute the primitive ideal

space of two examples. In order to do this we prove some new results on

aperiodicity. Our computations indicate that when every ideal is gauge

invariant, the primitive ideal space only depends on the 1-skeleton of the

\$k\$-graph in question.

• 2011