Spherical fuzzy sets and its representation of spherical fuzzy t-norms and t-conorms

In this paper, we introduce spherical fuzzy sets (SFSs) which is an advanced tool of the fuzzy sets, intuitionistic fuzzy sets and picture fuzzy sets. We investigate the basic properties of SFSs and compare the idea SFSs with picture fuzzy sets. The spaces of spherical membership grades and pictur e membership grades are examined by graphically. Some useful operation such as spherical fuzzy t’-norms and spherical fuzzy t’-conorms are introduced....