2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183864A lattice formulation of the four dimensional Wess-Zumino model that uses Ginsparg-Wilson fermions and keeps exact supersymmetry is presented. The supersymmetry transformation that leaves invariant the action at finite lattice spacing is determined by performing an iterative procedure in the coupling constant. The closure of the algebra, generated by this transformation is also showed.13 pages. Few references added. New appendix on Ward identity added. Version to be published in JHEPHigh Energy Physics - Latticetext