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H2-Norms of Partial Sums of the Fourier Series in the Laguerre Basis for Bounded Holomorphic Functions

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Ukrainian Mathematical Journal Aims and scope

We compute the upper bounds for the H2-norms of partial sums of the Fourier series in the Laguerre basis on the unit ball in the space of bounded holomorphic functions on unit disk. We present an application of the main result to the solution of some extreme problems in the theory of approximation of holomorphic functions.

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References

  1. Y. W. Lee, “Synthesis of electric networks by means of the Fourier transforms of Laguerre functions,” J. Math. Phys., 11, No. 1-4, 83–113 (1932).

    Article  Google Scholar 

  2. E. Hille, “Bilinear formulas in the theory of the transformation of Laplace,” Compos. Math., 6, 93–102 (1939).

    MathSciNet  MATH  Google Scholar 

  3. P. R. Masani, Norbert Wiener, 1894–1964, Birkhääuser, Basel (1990).

    Book  Google Scholar 

  4. B. G. S. Doman, The Classical Orthogonal Polynomials, World Scientific, Singapore (2016).

    MATH  Google Scholar 

  5. D. J. Newman and H. S. Shapiro, “The Taylor coefficients of inner functions,” Michigan. Math. J., 9, 249–255 (1962).

    MathSciNet  MATH  Google Scholar 

  6. V. V. Savchuk, “Best linear methods of approximation and optimal orthonormal systems of the Hardy space,” Ukr. Mat. Zh., 60, No. 5, 661–671 (2008); English translation: Ukr. Math. J., 60, No. 5, 730–743 (2008).

  7. V. V. Savchuk, “Best linear methods for approximation of bounded harmonic functions,” Nelin. Kolyv., 11, No. 2, 242–251 (2008); English translation: Nonlin. Oscillat., 11, No. 2, 255–264 (2008).

  8. V. V. Savchuk and S. O. Chaichenko, “Best approximations for the Cauchy kernel on the real axis,” Ukr. Mat. Zh., 66, No. 11, 1540–1549 (2014); English translation: Ukr. Math. J., 66, No. 11, 1731–1741 (2015).

  9. V. V. Savchuk, “Best approximations of the Cauchy–Szeg¨o kernel in the mean on the unit circle,” Ukr. Mat. Zh., 70, No. 5, 708–714 (2018); English translation: Ukr. Math. J., 70, No. 5, 817–825 (2018).

  10. A. Pinkus, n-Widths in Approximation Theory, Springer, Berlin (1985).

  11. S. Ya. Khavinson, “Theory of extreme problems for bounded analytic functions satisfying additional conditions inside a domain,” Usp. Mat. Nauk, 18, No. 2, 25–98 (1963).

    Google Scholar 

  12. E. Landau and D. Gaier, Darstellung und Bergundung Eininger Neurer Ergebnisse der Functionentheorie, Springer, Berlin (1986).

    Book  Google Scholar 

  13. S. Ya. Khavinson, “Estimates for Taylor sums of bounded analytic functions in a disk,” Dokl. Akad. Nauk SSSR, 80, No. 3, 333–336 (1951).

    MATH  Google Scholar 

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Correspondence to V. V. Savchuk.

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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 73, No. 1, pp. 128–137, January, 2021. Ukrainian DOI: 10.37863/umzh.v73i1.2371.

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Savchuk, V.V. H2-Norms of Partial Sums of the Fourier Series in the Laguerre Basis for Bounded Holomorphic Functions. Ukr Math J 73, 144–155 (2021). https://doi.org/10.1007/s11253-021-01914-1

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  • DOI: https://doi.org/10.1007/s11253-021-01914-1

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