Claudio Callejas,  João Marcos,  Benjamín Bedregal. 

In a previous paper we have studied two classes of fuzzy bi-implications based on t-norms and r-implications, and shown that they are increasingly weaker subclasses of the Fodor-Roubens bi-implication. Now we prove that each of these three classes of bi-implications are closed under automorphisms.

http://www.lbd.dcc.ufmg.br/colecoes/cbsf/2012/0011.pdf

Processando consulta.