On union and intersection of type-2 fuzzy sets not expressible by the sup-t-norm extension principle

Answering an open problem on t-norms for type-2 fuzzy sets

(2020) Xinxing Wu et al.   INFORMATION SCIENCES

On the Extensions of Overlap Functions and Grouping Functions to Fuzzy Truth Values

(2020) Zhi-qiang Liu et al.   IEEE TRANSACTIONS ON FUZZY SYSTEMS

The Distributive Laws of Convolution Operations Over Meet-Convolution and Join-Convolution on Fuzzy Truth Values

(2019) Wei Zhang et al.   IEEE TRANSACTIONS ON FUZZY SYSTEMS

Convolution lattices

(2018) L. De Miguel et al.   FUZZY SETS AND SYSTEMS

On T-Norms for Type-2 Fuzzy Sets

(2015) Pablo Hernandez et al.   IEEE TRANSACTIONS ON FUZZY SYSTEMS

Convex normal functions revisited

(2008) John Harding et al.   FUZZY SETS AND SYSTEMS

Lattices of convex normal functions

(2007) John Harding et al.   FUZZY SETS AND SYSTEMS