2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53949We investigate quantum corrections for a cosmological solution of the string effective action. Starting point is a classical solution containing an antisymmetric tensor field, a dilaton and a modulus field which has singularities in the scalar fields. As a first step we quantize the scalar fields near the singularity with the result that the singularities disappear and that in general non-perturbative quantum corrections form a potential in the scalar fields.talk presented at PASCOS 94, 11 Pages, 2 figures, Latex, epsf.tex, SLAC--PUB--6640High Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext