Saoudi, AnissaSupervisor: YAHI, Rachid2022-07-202022-07-202022-06-10http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/30872Inthisresearch,wehavestudiedsomeclassesofoperatorsfromaBanachlattice X intoa Banachspace Y ,suchastheclassofpositive p -summingoperators,positive p -majorizing operator,positive (p,q )-dominatedoperatorsanddisjoint p -summingoperators,enpositive p -summingoperators,positive p -majorizingoperators,disjoint p -summingoperators.Positive p-summing operators and disjoint p-summing operatorsThesis