All Stories

  1. Two-Dimensional Martingale Transforms and Their Applications in Summability of Walsh–Fourier Series

    Article • Journal of Geometric Analysis, May 2023, Springer Science + Business Media

    Karoly Nagy

  2. Strong summability of double Vilenkin–Fourier series

    Article • Acta Scientiarum Mathematicarum, May 2023, Springer Science + Business Media

    Karoly Nagy

  3. Strong summability of double Vilenkin–Fourier series

    Article • Acta Scientiarum Mathematicarum, October 2022, Springer Science + Business Media

    Karoly Nagy

  4. Matrix Summability of Walsh–Fourier Series

    Article • Mathematics, July 2022, MDPI AG

    Karoly Nagy

  5. Approximation by Marcinkiewicz-Type Matrix Transform of Vilenkin–Fourier Series

    Article • Mediterranean Journal of Mathematics, June 2022, Springer Science + Business Media

    Karoly Nagy

  6. Some properties of the Walsh-Nörlund means

    Article • Quaestiones Mathematicae, January 2022, Informa UK Limited

    Karoly Nagy

  7. On the maximal operators of weighted Marcinkiewicz type means of two-dimensional Walsh–Fourier series

    Article • Georgian Mathematical Journal, October 2021, De Gruyter

    Karoly Nagy

  8. Approximation by matrix transform of Vilenkin--Fourier series

    Article • Publicationes Mathematicae Debrecen, July 2021, University of Debrecen/ Debreceni Egyetem

    Karoly Nagy

  9. Approximation by Θ-Means of Walsh—Fourier Series in Dyadic Hardy Spaces and Dyadic Homogeneous Banach Spaces

    Article • Analysis Mathematica, May 2021, Springer Science + Business Media

    Karoly Nagy

  10. Strong Convergence Theorem for Walsh–Kaczmarz–Fejér Means

    Article • Mediterranean Journal of Mathematics, January 2021, Springer Science + Business Media

    Karoly Nagy

  11. Transference method for cone-like restricted summability of the two-dimensional Walsh-like systems

    Article • Mathematical Inequalities & Applications, January 2021, Element d.o.o.

    Karoly Nagy

  12. A sharp boundedness result for restricted maximal operators of Vilenkin–Fourier series on martingale Hardy spaces

    Article • Georgian Mathematical Journal, September 2019, De Gruyter

    Karoly Nagy

  13. Restricted summability of the multi-dimensional Cesaro means of Walsh--Kaczmarz--Fourier series

    Article • Publicationes Mathematicae Debrecen, April 2019, University of Debrecen/ Debreceni Egyetem

    Karoly Nagy

  14. Approximation by Marcinkiewicz ϴ-means of double Walsh-Fourier series

    Article • Mathematical Inequalities & Applications, January 2019, Element d.o.o.

    Karoly Nagy

  15. Approximation by Θ-Means of Walsh–Fourier Series

    Article • Analysis Mathematica, March 2018, Springer Science + Business Media

    Karoly Nagy

  16. On the restricted summability of the multi-dimensional Vilenkin-Cesàro means

    Article • Journal of Mathematical Inequalities, January 2017, Element d.o.o.

    Karoly Nagy

  17. Approximation of the Quadratic Partial Sums of Double Walsh–Kaczmarz–Fourier Series by Nörlund Means

    Article • Ukrainian Mathematical Journal, June 2016, Springer Science + Business Media

    Karoly Nagy

  18. Strong approximation by Marcinkiewicz means of two-dimensional Walsh–Kaczmarz–Fourier series

    Article • Analysis Mathematica, June 2016, Springer Science + Business Media

    Karoly Nagy

  19. The Walsh–Kaczmarz–Marcinkiewicz means and Hardy spaces

    Article • Acta Mathematica Hungarica, May 2016, Springer Science + Business Media

    Karoly Nagy

  20. Weak type inequality for the maximal operator of walsh-kaczmarz-marcinkiewicz means

    Article • Acta Mathematica Scientia, March 2016, Elsevier

    Karoly Nagy

  21. Strong convergence theorem for Walsh-Marcinkiewicz means

    Article • Mathematical Inequalities & Applications, January 2016, Element d.o.o.

    Karoly Nagy

  22. On the maximal operators of Fejér means with respect to the character system of the group of 2-adic integers in hardy spaces

    Article • Mathematical Notes, July 2015, Pleiades Publishing Ltd

    Karoly Nagy

  23. The two-dimensional Fejér means on diagonal Hardy space

    Article • Periodica Mathematica Hungarica, January 2015, Springer Science + Business Media

    Karoly Nagy

  24. On the restricted summability of Walsh–Kaczmarz–Fejér means

    Article • Georgian Mathematical Journal, January 2015, De Gruyter

    Karoly Nagy

  25. The maximal operator of Marcinkiewicz-Fejér means with respect to Walsh-Kaczmarz-Fourier series

    Article • Mathematical Inequalities & Applications, January 2015, Element d.o.o.

    Karoly Nagy

  26. On the restricted summability of two-dimensional Walsh--Fejer means

    Article • Publicationes Mathematicae Debrecen, July 2014, University of Debrecen/ Debreceni Egyetem

    Karoly Nagy

  27. Almost everywhere convergence of cone-like restricted two-dimensional Fejér means with respect to Vilenkin-like systems

    Article • St Petersburg Mathematical Journal, June 2014, American Mathematical Society (AMS)

    Karoly Nagy

  28. Approximation by Walsh–Marcinkiewicz means on the Hardy space H2/3

    Article • January 2014, Duke University Press

    Karoly Nagy

  29. Walsh-Marcinkiewicz means and Hardy spaces

    Article • Open Mathematics, January 2014, De Gruyter

    Karoly Nagy

  30. Maximal operators of Walsh–Kaczmarz logarithmic means

    Article • Complex Variables and Elliptic Equations, September 2013, Taylor & Francis

    Karoly Nagy

  31. On the boundedness of the maximal operators of double Walsh-logarithmic means of Marcinkiewicz type

    Article • Mathematica Slovaca, August 2013, De Gruyter

    Karoly Nagy

  32. On the maximal operator of Marcinkiewicz–Fejér means of the two-dimensional Walsh–Kaczmarz system

    Article • Georgian Mathematical Journal, January 2013, De Gruyter

    Karoly Nagy

  33. Integrals of weighted maximal logarithmic kernels on bounded Vilenkin groups

    Article • Periodica Mathematica Hungarica, January 2012, Springer Science + Business Media

    Karoly Nagy

  34. On the L 1 Norm of the Weighted Maximal Function of Walsh-Marcinkiewicz Kernels

    Article • January 2012, Springer Science + Business Media

    Karoly Nagy

  35. Approximation by Cesàro means of negative order of double Walsh-Kaczmarz-Fourier series

    Article • Tohoku Mathematical Journal, January 2012, Mathematical Institute, Tohoku University

    Karoly Nagy

  36. Approximation by Nӧrlund means of double Walsh-Fourier series for Lipschitz functions

    Article • Mathematical Inequalities & Applications, January 2012, Element d.o.o.

    Karoly Nagy

  37. Convergence in Measure of Logarithmic Means of Quadratical Partial Sums of Double Walsh-Kaczmarz-Fourier Series

    Article • Journal of Function Spaces and Applications, January 2012, Hindawi Publishing Corporation

    Karoly Nagy

  38. On the maximal operator of Walsh-Kaczmarz-Fejér means

    Article • Czechoslovak Mathematical Journal, September 2011, Institute of Mathematics, Czech Academy of Sciences

    Karoly Nagy

  39. On the logarithmic summability of Fourier series

    Article • Georgian Mathematical Journal, May 2011, De Gruyter

    Karoly Nagy

  40. On the maximal operator of Walsh--Marcinkiewicz means

    Article • Publicationes Mathematicae Debrecen, April 2011, University of Debrecen/ Debreceni Egyetem

    Karoly Nagy

  41. Approximation by Nörlund means of Walsh–Kaczmarz–Fourier series

    Article • Georgian Mathematical Journal, March 2011, De Gruyter

    Karoly Nagy

  42. Approximation by Nörlund means of quadratical partial sums of double Walsh-Fourier series

    Article • Analysis Mathematica, November 2010, Springer Science + Business Media

    Karoly Nagy

  43. Pointwise convergence of cone-like restricted two-dimensional Fejér means of Walsh-Fourier series

    Article • Acta Mathematica Sinica English Series, November 2010, Springer Science + Business Media

    Karoly Nagy

  44. On the maximal operator of (C, α)-means of Walsh–Kaczmarz–Fourier series

    Article • Ukrainian Mathematical Journal, September 2010, Springer Science + Business Media

    Karoly Nagy

  45. Maximal operators of Fejér means of Walsh-Kaczmarz-Fourier series

    Article • Journal of Function Spaces and Applications, January 2010, Hindawi Publishing Corporation

    Karoly Nagy

  46. On the Marcinkiewicz-Fejér means of double Fourier series with respect to the Walsh-Kaczmarz system

    Article • Studia Scientiarum Mathematicarum Hungarica, September 2009, Akademiai Kiado

    Karoly Nagy

  47. On the Fejér means of double Fourier series with respect to the Walsh-Kaczmarz system

    Article • Periodica Mathematica Hungarica, September 2007, Springer Science + Business Media

    Karoly Nagy

  48. On the two-dimensional Marcinkiewicz means with respect to Walsh–Kaczmarz system

    Article • Journal of Approximation Theory, October 2006, Elsevier

    Karoly Nagy

  49. On (H_pq, L_pq)-type inequality of maximal operator of Marcinkiewicz-Fejér means of double Fourier series with respect to the Kaczmarz system

    Article • Mathematical Inequalities & Applications, January 2006, Element d.o.o.

    Karoly Nagy

  50. Article • Analysis Mathematica, January 2002, Springer Science + Business Media

    Karoly Nagy

  51. The fundamental theorem of two-parameter pointwise derivative on Vilenkin groups

    Article • Analysis Mathematica, December 1999, Springer Science + Business Media

    Karoly Nagy