Abstract
We prove inequalities of the Landau–Kolmogorov–Hörmander type for the uniform norms (on some subinterval) of positive and negative parts of intermediate derivatives of functions defined on a finite interval. By using the limit transition, we obtain a new proof or the well-known Hörmander result.
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REFERENCES
E. Landau, “Einige Ungleichungen fur zweimal differenzierbare Funktion,” Proc. London Math. Soc., 13, 43–49 (1913).
J. Hadamard, “Sur le module maximum d'une fonction et de ses dérivées,” C. R. Soc. Math. France, 41, 68–72 (1914).
Yu. G. Bossé (G. E. Shilov), “On inequalities for derivatives,” in: Collected Works of Student Groups of Moscow University[in Russian], 17–27 (1937).
A. N. Kolmogorov, “On inequalities for upper bounds of successive derivatives of an arbitrary function on an infinite interval,” Uch. Zap. Mosk. Univ., 30, 3–16 (1939).
A. Kolmogoroff, “Une généralisation de J. Hadamard entre les bornes supérieures des dérivées successives d'une fonction,” C. R. Acad. Sci., 207, 764–765 (1938).
L. Hörmander, “New proof and generalization of inequality of Bohr,” Math. Scand., 2, 33–45 (1954).
A. P. Matorin, “On inequalities for the maximum absolute values of a function and its derivatives on a half-line,” Ukr. Mat. Zh., 7, No.7, 262–266 (1955).
S. B. Stechkin, “On inequalities for upper bounds of derivatives of an arbitrary function on a semiaxis,” Mat. Zametki, 1, No.6, 665–674 (1967).
I. J. Shoenberg and A. Cavaretta, Solution of Landau's Problem Concerning Higher Derivatives on Halfline, M. R. C. Techn. Sum. Rept. (1970).
I. J. Shoenberg and A. Cavaretta, “Solution of Landau's problem concerning higher derivatives on halfline,” in: Proc. Conf. Approxim. Theory (Varna, 1970)Sofia (1972), pp. 297–308.
A. Pinkus, N-Widths in Approximation Theory, Springer, Berlin (1985).
V. F. Babenko, V. A. Kofanov, and S. A. Pichugov, “On exact inequalities of the Landau–Hadamard–Kolmogorov type on a semiaxis,” Dopov. Akad. Nauk Ukr., 4, 34–38 (1997).
V. F. Babenko, V. A. Kofanov, and S. A. Pichugov, “On exact inequalities of the Landau–Kolmogorov – Hörmander type on a semiaxis,” Mat. Zametki, 65, No.2, 175–185 (1999).
W. Chen, “Landau–Kolmogorov inequality on a finite interval,” Bull. Austral. Math. Soc., 48, 485–494 (1993).
N. P. Korneichuk, Extremal Problems in Approximation Theory[in Russian], Nauka, Moscow (1976).
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Kofanov, V.A. On Inequalities of the Landau–Kolmogorov–Hörmander Type on a Segment and Real Straight Line. Ukrainian Mathematical Journal 52, 1913–1927 (2000). https://doi.org/10.1023/A:1010460027399
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DOI: https://doi.org/10.1023/A:1010460027399