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In the paper aggregations of fuzzy relations using functions of n variables are considered. After recalling properties of fuzzy relations, aggregation functions which preserve: reflexivity, irreflexivity, T-asymmetry, T-antisymmetry, symmetry, S-connectedness, T-transitivity, negative Stransitivity, T-S-semitransitivity and T-S-Ferrers property of fuzzy relations, where T is a t-norm and S is a t-conorm, are examined.

Preservation of t-norm and t-conorm based properties of fuzzy relations during aggregation process