Positive projections on \(C^*\)-algebras
The author of the paper under review investigates the difference between the completely positive projections and positive projections on \(C^*\)- algebras. As an application he describes the \(C^*\)-algebras for which \(n\)-positivity coincides with \((n+1)\)-positivity.
positive projections on \(C^*\)-algebras
scientific article; zbMATH DE number 13488