Abstract
In this paper we prove and discuss some new \(\left( H_{p},weak-L_{p}\right) \) type inequalities of maximal operators of Vilenkin–Nörlund means with monotone coefficients. We also apply these results to prove a.e. convergence of such Vilenkin–Nörlund means. It is also proved that these results are the best possible in a special sense. As applications, both some well-known and new results are pointed out.
Similar content being viewed by others
References
Blahota I., Tephnadze G., A note on maximal operators of Vilenkin-Nörlund means. Acta Math. Acad. Paedagog. Nyházi. (to appear).
Blahota, I., Gát, G., Goginava, U.: Maximal operators of Fejér means of Vilenkin–Fourier series, JIPAM. J. Inequal. Pure Appl. Math 7(4), 149 (2006)
Blahota, I., Gát, G., Goginava, U.: Maximal operators of Fejér means of double Vilenkin–Fourier series. Colloq. Math. 107(2), 287–296 (2007)
Blahota, I., Gát, G.: Norm summability of Nö rlund logarithmic means on unbounded Vilenkin groups. Anal. Theory Appl. 24(1), 1–17 (2008)
Fine, J.: Cesáro summability of Walsh–Fourier series. Proc. Nat. Acad. Sci. USA 41, 558–591 (1955)
Fujii, N.: A maximal inequality for \(H^{1}\)-functions on a generalized Walsh–Paley group. Proc. Amer. Math. Soc. 77(1), 111–116 (1979)
Gát, G.: Investigations of certain operators with respect to the Vilenkin system. Acta Math. Hung. 61, 131–149 (1993)
Gát, G., Goginava, U.: Uniform and L-convergence of logarithmic means of Walsh–Fourier series. Acta Math. Sin. Engl. Ser. 2, 497–506 (2006)
Gát, G., Goginava, U.: On the divergence of Nörlund logarithmic means of Walsh–Fourier series, (English summary). Acta Math. Sin. Engl. Ser. 25(6), 903–916 (2006)
Gát, G., Goginava, U.: A weak type inequality for the maximal operator of \((C,\alpha )\)-means of Fourier series with respect to the Walsh–Kaczmarz system. Acta Math. Hung. 125(1–2), 65–83 (2009)
Goginava, U.: On the approximation properties of Cesá ro means of negative order of Walsh–Fourier series, (English summary). J. Approx. Theory 115(1), 9–20 (2002)
Goginava, U.: Almost everywhere convergence of \( (C,\alpha )\)-means of cubical partial sums of d-dimensional Walsh-Fourier series. J. Approx. Theory 141(1), 8–28 (2006)
Goginava, U.: The maximal operator of the \((C,\alpha ) \) means of the Walsh–Fourier series. Ann. Univ. Sci. Budapest. Sect. Comput. 26, 127–135 (2006)
Goginava, U.: The maximal operator of Marcinkiewicz-Fejé r means of the d-dimensional Walsh–Fourier series, (English summary) East. J. Approx. 12(3), 295–302 (2006)
Kufner, A., Persson, L.-E.: Weighted Inequalities of Hardy Type. World Scientific Publishing Co. Inc., Singapore (2003)
Marcinkiewicz, I., Zygmund, A.: On the summability of double Fourier series. Fund. Math. 32, 112–132 (1939)
Meskhi, A., Kokilashvili, V., Persson, L.-E.: Weighted norm inequaities with general kernels. J. Math. Inequal. 12(3), 473–485 (2009)
Moore, C.N.: Summable Series and Convergence Factors. Dover Publications, Inc., New York (1966)
Móricz, F., Siddiqi, A.: Approximation by Nö rlund means of Walsh–Fourier series, (English summary). J. Approx. Theory 70(3), 375–389 (1992)
Nagy, K.: Approximation by Cesáro means of negative order of Walsh–Kaczmarz–Fourier series. East J. Approx. 16(3), 297–311 (2010)
Nagy, K.: Approximation by Nörlund means of quadratical partial sums of double Walsh–Fourier series. Anal. Math. 36(4), 299–319 (2010)
Nagy, K.: Approximation by Nörlund means of Walsh–Kaczmarz–Fourier series. Georgian Math. J. 18(1), 147–162 (2011)
Nagy, K.: Approximation by Nörlund means of double Walsh–Fourier series for Lipschitz functions. Math. Inequal. Appl. 15(2), 301–322 (2012)
Pál, J., Simon, P.: On a generalization of the concept of derivative. Acta Math. Acad. Sci. Hung. 29(1–2), 155–164 (1977)
Schipp, F.: Certain rearrangements of series in the Walsh system, (Russian). Math. Zametki 18(2), 193–201 (1975)
Simon, P.: Investigations with respect to the Vilenkin system. Ann. Univ. Sci. Budapest. Eõtvõs Sect. Math. 27(1984), 87–101 (1985)
Simon, P.: Cesáro summability with respect to two-parameter Walsh systems. Monatsh. Math. 131(4), 321–334 (2000)
Simon, P., Weisz, F.: Weak inequalities for Cesáro and Riesz summability of Walsh–Fourier series. J. Approx. Theory 151(1), 1–19 (2008)
Szász, O.: On the logarithmic means of rearranged partial sums of a Fourier series. Bull. Amer. Math. Soc. 48, 705–711 (1942)
Tephnadze, G.: The maximal operators of logarithmic means of one-dimensional Vilenkin–Fourier series. Acta Math. Acad. Paedagog. Nyházi. (N.S.) 27(2), 245–256 (2011)
Tephnadze, G.: Fejér means of Vilenkin-Fourier series. Studia Sci. Math. Hung. 49(1), 79–90 (2012)
Tephnadze, G.: On the maximal operators of Vilenkin–Fejér means. Turkish J. Math. 37(2), 308–318 (2013)
Tephnadze, G.: On the maximal operators of Riesz logarithmic means of Vilenkin–Fourier series. Studia Sci. Math. Hung. 51(1), 105–120 (2014)
Tephnadze, G.: On the maximal operators of Walsh-Kaczmarz-Nörlund means, Acta Math. Acad. Paedagog. Nyházi. 30(1), (2014).
Vilenkin, N.Y.: On a class of complete orthonormal systems. Amer. Math. Soc. Transl. 28(2), 1–3 (1963)
Weisz, F.: Martingale Hardy Spaces and Their Applications in Fourier analysis. Lecture Notes in Mathematics. Springer-Verlag, Berlin (1994)
Weisz, F.: Hardy Spaces and Cesáro Means of Two-Dimensional Fourier Series, pp. 353–367. Approximation theory and function series, Budapest (1995)
Weisz, F.: Cesáro summability of one- and two-dimensional Walsh–Fourier series. Anal. Math. 22(3), 229–242 (1996)
Weisz, F.: \(\left( C,\alpha \right) \) summability of Walsh–Fourier series, summability of Walsh–Fourier series. Anal. Math. 27(2), 141–155 (2001)
Weisz, F.: Q-summability of Fourier series. Acta Math. Hung. 103(1–2), 139–175 (2004)
Yabuta, K.: Quasi-Tauberian theorems, applied to the summability of Fourier series by Riesz’s logarithmic means. Tōhoku Math. J. 22(2), 117–129 (1970)
Acknowledgments
We thank the careful referees for some good suggestions, which improved the final version of this paper. The research was supported by Shota Rustaveli National Science Foundation Grant No. 13/06 (Geometry of function spaces, interpolation and embedding theorems. The research was also supported by a Swedish Institute scholarship, provided within the framework of the SI Baltic Sea Region Cooperation/Visby Programme.
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by Paul Butzer.
Rights and permissions
About this article
Cite this article
Persson, LE., Tephnadze, G. & Wall, P. Maximal Operators of Vilenkin–Nörlund Means. J Fourier Anal Appl 21, 76–94 (2015). https://doi.org/10.1007/s00041-014-9345-2
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00041-014-9345-2
Keywords
- Vilenkin system
- Vilenkin group
- Nörlund means
- Martingale Hardy space
- \(weak-L_{p}\) spaces
- Maximal operator
- Vilenkin–Fourier series