Semiprojectivity and properly infinite projections in graph C*-algebras

Abstract

We give a complete description of which unital graph C*-algebras are semiprojective, and use it to disprove two conjectures by Blackadar. To do so, we perform a detailed analysis of which projections are properly infinite in such C*-algebras.

References in corpus (3)

• Adding tails to C*-correspondences
• Semiprojectivity for Kirchberg algebras
• Subalgebras of finite codimension in semiprojective C*-algebras