Abstract
In this note we generalize and strengthen certain results contained in [12]. For example, we establish that, in a uniformly convex and smooth Banach space, any locally compact Chebyshev set is convex.
Similar content being viewed by others
Literature cited
L. P. Vlasov, “Approximatively convex sets in Banach spaces,” Dokl. Akad. Nauk SSSR,163, No. 1, 18–21 (1965).
L. P. Vlasov, “Chebyshev sets,” Dokl. Akad. Nauk SSSR,173, No. 3, 491–494 (1967).
N. V. Efimov and S. B. Stechkin, “Some properties of Chebyshev sets,” Dokl. Akad. Nauk SSSR,118, No. 1, 17–19 (1958).
N. V. Efimov and S. B. Stechkin, “Support properties of sets in Banach spaces and Chebyshev sets,” Dokl. Akad. Nauk SSSR,127, No. 2, 254–257 (1959).
N. V. Efimov and S. B. Stechkin, “Approximative compactness and Chebyshev sets,” Dokl. Akad. Nauk SSSR,140, No. 3, 522–524 (1961).
V. I. Ponomarev, “A new space of closed sets and many-valued, continuous transformations of bicompacta,” Mat. Sb.,48, No. 2, 191–212 (1959).
S. B. Stechkin, “Approximative properties of sets in normed linear spaces,” Rev. Roumaine Math. Pures et Appl.,8, No. 1, 5–18 (1963).
S. Eilenberg and N. Steenrod, Foundations of Algebraic Topology, Princeton University Press, Princeton, New Jersey (1952).
S. Eilenberg and D. Montgomery, “Fixed point theorems for multi-valued transformations,” Am. J. Math.,68, No. 2, 214–222 (1946).
V. L. Klee, Remarks on Nearest Points in Normed Linear Spaces, Proc. Colloq. Convexity, Copenhagen, 1965. Copenhagen (1967), pp. 168–176.
I. Singer, “Some remarks on approximative compactness,” Rev. Roumaine Math. Pures et Appl.,9, No. 2, 167–177 (1964).
D. E. Wulbert, Continuity of Metric Projections. Approximation Theory in a Normed Linear Lattice. University of Texas Computation Center, May, 1966.
Author information
Authors and Affiliations
Additional information
Translated from Matematicheskie Zametki, Vol. 3, No. 1, pp. 59–69, January, 1968.
I wish to express my thanks to S. B. Stechkin for his valuable comments.
Rights and permissions
About this article
Cite this article
Vlasov, L.P. Chebyshev sets and some generalizations of them. Mathematical Notes of the Academy of Sciences of the USSR 3, 36–41 (1968). https://doi.org/10.1007/BF01386963
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01386963