2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128472A partial description of the structure of positive unital maps $ϕ: M_2(\bC) \to M_{n+1}(\bC)$ ($n\geq 2$) is given.15 pagesFunctional AnalysisOperator Algebras47B65, 47L07On the structure of positive maps between matrix algebrastext