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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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Derivatives of Bernstein polynomials and smoothness
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by Z. Ditzian PDF
Proc. Amer. Math. Soc. 93 (1985), 25-31 Request permission

Abstract:

Equivalence relations between the asymptotic behaviour of derivatives of Bernstein polynomials and the smoothness of the function they approximate are given. This is achieved with an a priori condition that the function is of class $\operatorname {Lip}\beta$ with some small $\beta > 0$. The a priori condition is dropped when a similar equivalence relation using the Katorovich operator is proved.
References
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  • M. Becker, An elementary proof of the inverse theorem for Bernšteĭn polynomials, Aequationes Math. 19 (1979), no. 2-3, 145–150. MR 556718, DOI 10.1007/BF02189862
  • Z. Ditzian, A global inverse theorem for combinations of Bernšteĭn polynomials, J. Approx. Theory 26 (1979), no. 3, 277–292. MR 551679, DOI 10.1016/0021-9045(79)90065-0
  • —, Interpolation and the rate of convergence of Bernstein polynomials, Approximation Theory. III (W. Cheney, ed.), Academic Press, New York, 1980, pp. 241-347.
  • L. I. Strukov and A. F. Timan, Mathematical expectation of continuous functions of random variables, smoothness, and variance, Sibirsk. Mat. Ž. 18 (1977), no. 3, 658–664, 719 (Russian). MR 0454471
  • A. F. Timan, Theory of approximation of functions of a real variable, A Pergamon Press Book, The Macmillan Company, New York, 1963. Translated from the Russian by J. Berry; English translation edited and editorial preface by J. Cossar. MR 0192238
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Additional Information
  • © Copyright 1985 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 93 (1985), 25-31
  • MSC: Primary 41A10
  • DOI: https://doi.org/10.1090/S0002-9939-1985-0766520-7
  • MathSciNet review: 766520