| In this thesis,we discuss the symmetric functions of type-2 fuzzy sets.First-ly,the definition of complementary functions are presented.Then,we study the properties of complementary functions and also provide the operations properties of symmetric functions.At the same time,we discover that all the symmetric functions are not constituted the subalge-bra of M.At last,operation laws under S-implications and S-complications about symmetric functions are discussed. |
