2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/125603Dirac-Schrödinger systems play a central role when modeling Dirac bundles and Dirac-Schrödinger operators near the boundary, along ends or near other singularities of Riemannian manifolds. In this article we develop the Fredholm theory of Dirac-Schrödinger systems with Lipschitz coefficients.Analysis of PDEs35F15, 35B65, 58J32Regularity and index theory for Dirac-Schrödinger systems with Lipschitz coefficientstext