Recently, Dryga\'{s} generalized nullnorms and t-operators and introduced semi-t-operators by eliminating commutativity from the axiom of t-operators. This paper is devoted to the study of the discrete counterpart of semi-t-operators on a finite totally ordered set. A characterization of semi-t-operators on a finite totally ordered set is given. Moreover, The relations among nullnorms, t-operators, semi-t-operators and pseudo-t-operators (i.\,e., commutative semi-t-operators) on a finite totally ordered set are shown.
finite chain, fuzzy connectives, t-operator, semi-t-operator, pseudo-t-operator
03E72