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Some Remarks on Smooth Mappings of Hilbert and Banach Spaces and Their Local Convexity Property

open access: yesAxioms
We analyze smooth nonlinear mappings for Hilbert and Banach spaces that carry small balls to convex sets, provided that the radii of the balls are small enough.
Yarema A. Prykarpatskyy   +3 more
doaj   +1 more source

Operator Monotone Functions and Convexity of Its Derivatives Norms

open access: yesپژوهش‌های ریاضی, 2021
Introduction  Given the important role convex and quasi-convex functions play in many areas of mathematics and especially in optimization, one of the inequalities that has attracted the attention of many mathematicians in recent decades is Hermit ...
Zahra Rahimi Chegeni   +2 more
doaj  

On regularly convex sets [PDF]

open access: bronze, 1941
Kôsaku Yosida, Masanori Fukamiya
openalex   +1 more source

Contractions of Convex Sets [PDF]

open access: yesProceedings of the American Mathematical Society, 1977
In this paper it is shown that, in a vector space over any ordered field, a noninfinitesimal contraction of a convex set K can be written as an intersection of translates of K.
openaire   +2 more sources

A *-mixing convergence theorem for convex set valued processes

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1987
In this paper the concept of a *-mixing process is extended to multivalued maps from a probability space into closed, bounded convex sets of a Banach space.
A. de Korvin, R. Kleyle
doaj   +1 more source

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