A Note on Decomposable Maps on Operator Systems
arXiv:2006.12405
Abstract
This article contains a characterization of operator systems $\cS$ with the property that every positive map $ϕ:\cS \rightarrow M_n$ is decomposable, as well as an alternate and a more direct proof of a characterization of decomposable maps due to E. Størmer.
8 Pages. NYJM