Some results on stability and on characterization of K-convexity of set-valued functions
Tiziana Cardinali, Francesca Papalini (1993)
Annales Polonici Mathematici
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We present a stability theorem of Ulam-Hyers type for K-convex set-valued functions, and prove that a set-valued function is K-convex if and only if it is K-midconvex and K-quasiconvex.