%0 Journal Article %T Differential equations in vertex algebras and simple modules for the Lie algebra of vector fields on a torus %A Yuly Billig %A Alexander Molev %A Ruibin Zhang %J Mathematics %D 2007 %I arXiv %X We study irreducible representations for the Lie algebra of vector fields on a 2-dimensional torus constructed using the generalized Verma modules. We show that for a certain choice of parameters these representations remain irreducible when restricted to a loop subalgebra in the Lie algebra of vector fields. We prove this result by studying vertex algebras associated with the Lie algebra of vector fields on a torus and solving non-commutative differential equations that we derive using the vertex algebra technique. %U http://arxiv.org/abs/0707.0659v1