2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55961In this paper we present a method of deforming to first order the stress-tensor and the supercurrent of the superstring corresponding to turning on NS-NS bosonic fields. Furthermore we discuss the difficulties associated with turning on spacetime fermions and R-R bosons. We also derive the gauge symmetries of the massless spacetime fields.7 pages, plain Tex, to appear in: Proc. Int. Conf. "Trends in Mathematical Physics", Knoxville, Oct. 14-17 1998, (Cambridge: International Press (1999))High Energy Physics - Theorytext