Open problems from the 2nd International Conference on Fuzzy Sets Theory and Its Applications (Q1367466)

During the workshops at the 2nd International Conference on Fuzzy Sets Theory and Its Applications (Liptovský Mikuáš, Slovak Republic, January 31--February 4, 1994), several open problems have been specified by the participants. We have decided to write them down and to publish them to give other colleagues of us an opportunity to think about the interesting and important problems coming from active workers in fuzzy logic. The problems have various degrees of difficulty and they are divided into three groups \((t\)-norms; fuzzy logic; set representations of fuzzy quantum structures).