2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53917We present a summary of the results of an explicit calculation of the strength of non-perturbative interactions in matrix models and string effective Lagrangians. These interactions are induced by single eigenvalue instantons in the $d=1$ bosonic matrix model. A well defined approximation scheme is used to obtain induced operators whose exact form we exhibit. We briefly discuss the possibility that similar instantons in a supersymmetric version of the theory may break supersymmetry dynamically.Latex document, 17 pages, preprint CERN-TH.7356/94, UPR-620THigh Energy Physics - Theorytext