Hadla, Racha2021-09-052021-09-052021http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/25329In this memoir, we have studied a special type of fuzzy topological spaces, which is the fuzzy topologies based on fuzzy relations with their fundamental properties. Also, we have proved that the family of fuzzy open sets in this topology forms the lattice structure.enFuzzy set , Topology, Topology based on relation, Lattice.Thesis