2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91271A class of linear positive, trace preserving maps in $M_n$ is given in terms of affine maps in $\bBR^{n^2-1}$ which map the closed unit ball into itself.10 pagesQuantum PhysicsA Class of Linear Positive Maps in Matrix Algebrastext