We obtain new exact Landau-type estimates of the uniform norms of one-dimension Riesz potentials of the partial derivatives of functions of many variables via the norm of these functions and the norm of their Laplacians.
Similar content being viewed by others
References
V. V. Arestov and V. N. Gabushin, “The best approximation of unbounded operators by bounded operators,” Izv. Vyssh. Uchebn. Zaved., Ser. Mat., No. 11, 42–63 (1995).
V. V. Arestov, “Approximation of unbounded operators by bounded operators and related problems,” Usp. Mat. Nauk, 51, No. 6, 88–124 (1996).
V. F. Babenko, N. P. Korneichuk, V. A. Kofanov, and S. A. Pichugov, Inequalities for Derivatives and Their Applications [in Russian], Naukova Dumka, Kiev (2003).
V. N. Konovalov, “Exact inequalities for the norms of functions and the third partial and second mixed derivatives,” Mat. Zametki, 23, No. 1, 67–78 (1978).
A. P. Buslaev and V. M. Tikhomirov, “On the inequalities for derivatives in the multidimensional case,” Mat. Zametki, 25, No. 1, 59–74 (1979).
O. A. Timoshin, ‘Best approximation of the operator of second mixed derivative,” Izv. Ros. Akad. Nauk, Ser. Mat., 62, No. 1, 201–210 (1998).
O. A. Timoshin, “Best approximation of the operator of second mixed derivative in the L and C metrics in the plane,” Mat. Zametki, 36, No. 3, 369–375 (1984).
V. G. Timofeev, “Kolmogorov-type inequalities with Laplacian,” in: Theory of Functions and Approximations [in Russian], Saratov University, Saratov (1983), pp. 84–92.
V. G. Timofeev, “Landau-type inequalities for functions of several variables,” Mat. Zametki, 37, No. 5, 676–689 (1985).
V. F. Babenko, V. A. Kofanov, and S. A. Pichugov, “Multivariate inequalities of Kolmogorov type and their applications,” in: G. Nërberger, J. W. Schmidt, and G. Walz (editors), Multivariate Approximation and Splines, Birkh¨auser, Basel (1997), pp. 1–12.
V. F. Babenko, “On the exact Kolmogorov-type inequalities for functions of two variables,” Dop. Nats. Akad. Nauk Ukr., No. 5, 7–11 (2000).
S. G. Samko, A. A. Kilbas, and O. I. Marichev, Integrals and Derivatives of Fractional Order and Their Applications [in Russian], Nauka i Tekhnika, Minsk (1987).
S. P. Geisberg, “Generalization of the Hadamard inequality,” in: Investigation in Some Problems of the Constructive Theory of Functions [in Russian], Proc. of LOMI, 50 (1965), pp. 42–54.
V. V. Arestov, “Inequalities for fractional derivatives on the half-line,” in: Approximation Theory, PWN, Warsaw (1979), pp. 19–34.
G. G. Magaril-Il’jaev and V. M. Tihomirov, “On the Kolmogorov inequality for fractional derivatives on the half-line,” Anal. Math., 7, No. 1, 37–47 (1981).
V. F. Babenko and M. S. Churilova, “On the Kolmogorov-type inequalities for derivatives of fractional order,” Vestn. Dnepropetr. Univ., Ser. Mat., 6, 16–20 (2001).
V. F. Babenko and S. A. Pichugov, “Kolmogorov type inequalities for fractional derivatives of H¨older functions of two variables,” East J. Approxim., 13, No. 3, 321–329 (2007).
V. F. Babenko and S. A. Pichugov, “Exact estimates for the norms of fractional derivatives of functions of many variables satisfying the Hölder condition,” Mat. Zametki, 87, 26–34 (2010).
V. F. Babenko, N. V. Parfinovych, and S. A. Pichugov, “Sharp Kolmogorov-type inequalities for the norms of fractional derivatives of multivariate functions,” Ukr. Mat., Zh., 62, No. 3, 301–314 (2010); English translation: Ukr. Math. J., 62, No. 3, 343–357 (2010).
V. P. Motornyi, V. F. Babenko, A. A. Dovgoshei, and O. I. Kuznetsova, Approximation Theory and Harmonic Analysis [in Russian], Naukova Dumka, Kiev (2010).
V. F. Babenko, N. V. Parfinovich, and S. A. Pichugov, “Kolmogorov-type inequalities for the norms of Riesz derivatives of functions of many variables with Laplacian bounded in L ∞ and related problems,” Mat. Zametki, 95, No. 1, 3–17 (2014).
V. F. Babenko and N. V. Parfinovich, “Kolmogorov-type inequalities for the norms of Riesz derivatives of functions of many variables and some their applications,” Ukr. Mat. Visn., 9, No. 2, 157–174 (2012).
V. F. Babenko and N. V. Parfinovich, “Kolmogorov-type inequalities for the norms of Riesz derivatives of functions of many variables and some their applications,” Proc. of the Institute of Mathematics and Mechanics, Ural Division of the Russian Academy of Sciences [in Russian], 17, No. 3 (2011), pp. 60–70.
E. Landau, “Einige Ungleichungen für zweimal differenzierbare Funktion,” Proc. London Math. Soc., 13, 43–49 (1913).
V. F. Babenko and T. Yu. Leskevich, “Approximation of some classes of functions of many variables by harmonic splines,” Ukr. Mat. Zh., 64, No. 8, 1011–1024 (2012); English translation: Ukr. Math. J., 64, No. 8, 1151–1167 (2013).
Author information
Authors and Affiliations
Additional information
Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, No. 7, pp. 867–878, July, 2016.
Rights and permissions
About this article
Cite this article
Babenko, V.F., Parfinovich, N.V. Estimation of the Uniform Norm of One-Dimensional Riesz Potential of the Partial Derivative of a Function with Bounded Laplacian. Ukr Math J 68, 987–999 (2016). https://doi.org/10.1007/s11253-016-1272-8
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11253-016-1272-8