Hamza Boughambouz2025-05-272025-05-272024-09-15https://repository.univ-msila.dz/handle/123456789/46272This thesis systematically explores the compositions of ternary relations, identifying all possible compositions and examining their associativity properties, including mixed-associativity. It introduces Bandler-Kohout-compositions for ternary relations, extends the framework to fuzzy settings, and establishes connections between these compositions and binary relations through projection and cylindrical extension.enTernary relationsComposition of relationsBandler-Kohout compositionsFuzzy relationsAssociativity.Thesis