2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51590Based on the non-abelian effective action for D1-branes, a new action for matrix string theory in non-trivial backgrounds is proposed. Once the background fields are included, new interactions bring the possibility of non-commutative solutions i.e. The Myers effect for ``string bits'' .6 pages, talk given in the at the 24th annual Montreal-Rochester-Syracuse-Toronto (MRST) Conference on Theoretical Physics, May 15-1702 2002. Proceedings will be published by the American Institute of PhysicsHigh Energy Physics - Theorytext