Garmendia, L.Salvador, AMontero, JavierRuan, DaMontero, Javier2023-06-202023-06-202008-09978-981-279-946-310.1142/9789812799470_0026https://hdl.handle.net/20.500.14352/531608th International Conference on Fuzzy Logic and Intelligent Technologies in Nuclear Science. Madrid, Spain, 21-24 September 2008A fast method to compute a T-indistinguishability from a reflexive and symmetric fuzzy relation is given for any left-continuous t-norm, taking O(n(3)) time complexity, where n is the number of elements in the universe. It is proved that the computed fuzzy relation is a T-transitive opening when T is the minimum t-norm or a strictly growing t-norm. As far as we know, this is the first known algorithm that computes T-transitive openings preserving the reflexive and symmetric properties.engbook parthttp://eproceedings.worldscinet.com/9789812799470/9789812799470_0026.htmlrestricted access510.64Fuzzy relationsClosuresLógica simbólica y matemática (Matemáticas)1102.14 Lógica Simbólica