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Monotonicity conditions for a sequence of generalized polynomials of S. N. Bernshtein and A. O. Gel'fond

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Abstract

It is shown that the sequence of generalized polynomials of S. N. Bernshtein and A. O. Gel'fond, which corresponds to a functionf(x), is an increasing or decreasing sequence depending on the concavity or convexity of the function. Analogous results are given in the case of functions of two variables.

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Literature cited

  1. O. Aramá, “Proprietati privind monotonia siului polinoamelor de interpolare alelui S. N. Bernstein si aplicarea lor la studiul apraximarii functililor,” Acad. Romania Fil. Cluj Studii, Cere Mat.,8, No. 3–4, 195–210 (1957).

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  2. A. Lopas, “Some properties of the linear positive operators,” Matematica (Cluj),9 (32), No. 1, 77–83 (1967).

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  3. A. O. Gel'fond, Calculus of Finite Differences [in Russian], Moscow (1960).

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Translated from Matematicheskie Zametki, Vol. 5, No. 6, pp. 747–752, June, 1969.

In conclusion, the author wishes to express his thanks to I. I. Ibragimov and A. D. Gadzhiev for their interest in his work.

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Shakhverdiev, V.M. Monotonicity conditions for a sequence of generalized polynomials of S. N. Bernshtein and A. O. Gel'fond. Mathematical Notes of the Academy of Sciences of the USSR 5, 446–449 (1969). https://doi.org/10.1007/BF01374475

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  • DOI: https://doi.org/10.1007/BF01374475

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