Comment on Pythagorean and Complex Fuzzy Set Operations
Lianzhen Liu, Xiangyang Zhang · IEEE Transactions on Fuzzy Systems · 2018
Dicket al.introduced a relation$\leq ^*$on$\Pi -i$numbers and proved that$(\Pi -i, \leq ^*)$is a bounded distributive complete lattice. In the present paper, we point out that the relation$\leq ^*$is not a partial order and that$(\Pi -i, \leq ^*)$is not a lattice. In addition, we study some partial orders on$\Pi -i$numbers.