Zitouni, AichaRapporteur: Belaala, Maatougui2023-07-022023-07-022023-06-10http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/39868The context of this dissertation falls within the framework of functional analysis and more precisely the geometry of space of Banach. We have studies the nonlinear operator .First we discussed the generalization of the Lipschitz operator definition and from the definition of strictly Lipschitz operator summing. We have introduced new characterization. Finally we finished our work by the study of the notion of Lipschitz φ-summing operators.frLipschitz p-summing operator , strictly Lipschitz p-summing opérator,strictly p-nuclear operator , norme tensor,Peitsch factorisation.Thesis