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math.LO2026
Representation theorems for four classes of uninorms on bounded trellises
Zhenyu Xiu
In this paper, we establish necessary and sufficient representation theorems for the classes , , $\w…
math.LO2026
A complete representation theorem for nullnorms on bounded trellises
Zhenyu Xiu
We establish necessary and sufficient conditions under which a binary operation on a bounded trellis is a proper nullnorm. The representation combines a t-conorm on the lower inter…