The Key Points of New Fuzzy Set Theory

The key of new fuzzy set theory (C-fuzzy set theory): the different kinds of relations between two fuzzy sets, the statistics background of fuzzy sets, the calculation of grade of membership, the overlapping coefficient, and the expansions of Zadeh's fuzzy set theory, etc., are discussed in this paper. This paper also can be regard as an introduction of the Chinese book "New fuzzy set".