Abstract:
We study the mappings taking real intervals into metric spaces and possessing a bounded generalized variation in the sense of Jordan–Riesz–Orlicz. We establish some embeddings of function spaces, the structure of the mappings, the jumps of the variation, and the Helly selection principle. We show that a compact-valued multi-valued mapping of bounded generalized variation with respect to the Hausdorff metric has a regular selection of bounded generalized variation. We prove the existence of selections preserving the properties of multi-valued mappings that are defined on the direct product of an interval and a topological space, have a bounded generalized variation in the first variable, and are upper semicontinuous in the second variable.
This publication is cited in the following 19 articles:
Vyacheslav V. Chistyakov, SpringerBriefs in Optimization, From Approximate Variation to Pointwise Selection Principles, 2021, 1
Chistyakov V.V., “Asymmetric Variations of Multifunctions With Application”, J. Math. Anal. Appl., 478:2 (2019), 421–444
Chistyakov V.V. Chistyakova S.A., “The Joint Modulus of Variation of Metric Space Valued Functions and Pointwise Selection Principles”, Studia Math., 238:1 (2017), 37–57
Yu. V. Tret'yachenko, “A generalization of the Helly theorem for functions with values in a uniform space”, Russian Math. (Iz. VUZ), 54:5 (2010), 35–46
Yu. V. Tretyachenko, V. V. Chistyakov, “Selection Principle for Pointwise Bounded Sequences of Functions”, Math. Notes, 84:3 (2008), 396–406
A. A. Vasil'eva, “Multivalent Maps with Second-Order Modulus of Continuity”, Math. Notes, 82:5 (2007), 708–712
V. V. Chistyakov, “A Pointwise Selection Principle for Functions of a Single Variable with Values in a Uniform Space”, Siberian Adv. Math., 16:3 (2006), 15–41
Chistyakov, VV, “The optimal form of selection principles for functions of a real variable”, Journal of Mathematical Analysis and Applications, 310:2 (2005), 609
V. V. Chistyakov, “Selections of Bounded Variation”, Journal of Applied Analysis, 10:1 (2004), 1
Balcerzak, M, “On Helly's principle for metric semigroup valued by mappings of two real variables”, Bulletin of the Australian Mathematical Society, 66:2 (2002), 245