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Abstract: In this study, we introduce and study new fuzzy-interval integral is known as
fuzzy-interval double integral, where the integrand is fuzzy-interval-valued functions (FIVFs). Also,
some fundamental properties are also investigated. Moreover, we present a new class of convex
fuzzy-interval-valued functions is known as coordinated convex fuzzy-interval-valued functions
(coordinated convex FIVFs) through fuzzy order relation (FOR). The FOR ሺ≼ሻ and fuzzy inclusion
relation ሺ⊇ሻ are two different concepts. With the help of fuzzy
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