2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91024We survey what is known about the information transmitting capacities of quantum channels, and give a proposal for how to calculate some of these capacities using linear programming.26 pages, 3 figures, invited talk for 18th International Symposium on Mathematical Programming, Copenhagen, Denmark, August 2003Quantum Physicstext