Abstract
In this chapter, we discuss modal (of two types), level (of two types) and topological operators, defined over IVIFSs and study some of their basic properties. We prove only these assertions that do not have analogues in the IFS-case. The proofs of the remaining assertions are similar to the proofs, given, e.g., in [4, 6].
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Atanassov, K.T. (2020). Operators over IVIFSs. In: Interval-Valued Intuitionistic Fuzzy Sets. Studies in Fuzziness and Soft Computing, vol 388. Springer, Cham. https://doi.org/10.1007/978-3-030-32090-4_4
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DOI: https://doi.org/10.1007/978-3-030-32090-4_4
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