Semiprojectivity and properly infinite projections in graph C*-algebras
classification
🧮 math.OA
keywords
algebrasgraphinfiniteprojectionsproperlyanalysisblackadarcomplete
read the original 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.
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