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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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A note on intersection of lower semicontinuous multifunctions
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by Alojzy Lechicki and Andrzej Spakowski PDF
Proc. Amer. Math. Soc. 95 (1985), 119-122 Request permission

Abstract:

Let ${F_1}$ and ${F_2}$ be closed and convex valued multifunctions from a topological space $X$ to a normed space $Y$. Assume that the multifunctions are lower semicontinuous at ${x_0}$. We proof that the intersection multifunction $F = {F_1} \cap {F_2}$ is lower semicontinuous at ${x_0}$ provided $F({x_0})$ is bounded and has nonempty interior.
References
    Y. Borisovich, B. D. Gel’man, A. D. Myshkis and V. V. Obukhovskii, Multivalued mappings, J. Soviet Math. 24 (1984), 719-791.
  • Szymon Dolecki, Tangency and differentiation: some applications of convergence theory, Ann. Mat. Pura Appl. (4) 130 (1982), 223–255. MR 663973, DOI 10.1007/BF01761497
  • —, Metrically upper semicontinuous multifunctions and their intersections, University of Wisconsin, Technical Summary Report 2035, 1980.
  • M. Š. Farber, Differentiable cross sections of multivalued mappings, Questions of mathematical cybernetics and applied mathematics, No. 3 (Russian), “Èlm”, Baku, 1978, pp. 47–60 (Russian). MR 548159
  • K. Kuratowski, Topology. Vol. I, Academic Press, New York-London; Państwowe Wydawnictwo Naukowe [Polish Scientific Publishers], Warsaw, 1966. New edition, revised and augmented; Translated from the French by J. Jaworowski. MR 0217751
  • Ernest Michael, Topologies on spaces of subsets, Trans. Amer. Math. Soc. 71 (1951), 152–182. MR 42109, DOI 10.1090/S0002-9947-1951-0042109-4
  • Patrick Momal, Théorèmes de maximum, C. R. Acad. Sci. Paris Sér. A 278 (1974), 905–907 (French). MR 350693
  • Raoul Robert, Convergence de fonctionnelles convexes, C. R. Acad. Sci. Paris Sér. A-B 276 (1973), A727–A729 (French). MR 324442
  • M. G. Rabinovič, Certain classes of spaces of convex sets and their extensions, Sibirsk. Mat. Ž. 8 (1967), 1405–1415 (Russian). MR 0222600
  • Andrzej Spakowski, On approximation by step multifunctions, Comment. Math. Prace Mat. 25 (1985), no. 2, 363–371. MR 844653
  • R. Urbański, A generalization of the Minkowski-Rȧdström-Hörmander theorem, Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys. 24 (1976), no. 9, 709–715 (English, with Russian summary). MR 442646
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Additional Information
  • © Copyright 1985 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 95 (1985), 119-122
  • MSC: Primary 54C60; Secondary 46N05, 90C48
  • DOI: https://doi.org/10.1090/S0002-9939-1985-0796459-2
  • MathSciNet review: 796459