Journal of Jilin University Science Edition ›› 2020, Vol. 58 ›› Issue (3): 550-562.

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General Forms of Lower Triangular Ordinal Sumsof Fuzzy Implications

XUAN Suling, ZHOU Hongjun, LIU Ni   

  1. College of Mathematics and Information Science, Shaanxi Normal University, Xi’an 710119, China
  • Received:2019-08-27 Online:2020-05-26 Published:2020-05-20
  • Contact: ZHOU Hongjun E-mail:hjzhou@snnu.edu.cn

Abstract: By using the method of ordinal sum, we investigated the  necessary and sufficient conditions for a general fuzzy implication to be a proper complement to linear transformations of a given family of fuzzy implications on a given family of lower triangular parts of subsquares in the unit square. We put all kinds of  lower triangular ordinal sum implications into a unified framework, and then gave the general form of construction of  lower triangular ordinal sums  of fuzzy implications.

Key words: fuzzy implication, lower triangular, ordinal sum,  , necessary , and sufficient condition

CLC Number: 

  • O159.1