A support theorem for delta (s, t)-convex mappings
نویسندگان
چکیده
منابع مشابه
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Let Z and X be Banach spaces, U ⊂ Z an open convex set and f : U → X a mapping. We say that f is a delta-convex mapping (d. c. mapping) if there exists a continuous convex function h on U such that y ◦ f + h is a continuous convex function for each y ∈ Y , ‖y∗‖ = 1. We say that f : U → X is locally d. c. if for each x ∈ U there exists an open convex U ′ such that x ∈ U ′ ⊂ U and f |U ′ is d. c....
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ژورنال
عنوان ژورنال: Aequationes mathematicae
سال: 2014
ISSN: 0001-9054,1420-8903
DOI: 10.1007/s00010-014-0290-6