2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55990Compactification of Matrix Model on a Noncommutative torus is obtained from strings ending on D-branes with background B field. The BPS spectrum of the system and a novel SL(2,Z) symmetry are discussed.7 pages, Revtex file, no figuresHigh Energy Physics - Theorytext