Interval Valued Intuitionistic Fuzzy Sets
Krassimir Todorov Atanassov · Studies in fuzziness and soft computing · 1999
In this chapter, the basic definitions and properties of the interval valued intuitionistic fuzzy sets (IVIFSs) will be introduced. We will omit the majority of the proofs below, which are, in general, analogous to the proofs from Chapter 1.