MERZOUG etSAOUDI, Samiha etWarda2018-01-312018-01-312017http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/1970In this work, we will see some basic definitions and properties of the ordered sets theory that will be needed throughout this work, we study the fixed point property for some algebra structures, first we will provide interesting theorems of fixed point property on order sets, on complete lattice and finally on chain complete with proofs and illustrations examplesfrThéorèmes des points fixes dans des structures ordonnéesThesis