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Convergence of a conjugate function in Zygmund space by almost Nörlund transform

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The proposed work aims to study the degree of convergence of a function ĥ, conjugate to a Lebesgue integrable 2π-periodic function h, in the Zygmund class Zr(ν), r ≥ 1, by almost Nörlund transform. Our results give sharper estimates than the previous existing results.
Wydawca
Rocznik
Strony
329--339
Opis fizyczny
Bibliogr. 23 poz., wykr.
Twórcy
autor
  • Department of Mathematics, National Institute of Technology Uttarakhand, Srinagar, Pauri Garhwal, India
autor
  • Department of Mathematics, National Institute of Technology Uttarakhand, Srinagar, Pauri Garhwal, India
Bibliografia
  • [1] D. Borwein, On strong and absolute summability, Proc. Glasgow Math. Assoc. 4 (1960), no. 3, 122-139.
  • [2] C. K. Chui, An Introduction to Wavelets, Academic Press, Boston, 1992.
  • [3] G. Das, B. Kuttner and S. Nanda, Some sequence spaces and absolute almost convergence, Trans. Amer. Math. Soc. 283 (1984), no. 2, 729-739.
  • [4] Deepmala and L.-I. Piscoran, Approximation of signals (functions) belonging to certain Lipschitz classes by almost Riesz means of its Fourier series, J. Inequal. Appl. 2016 (2016), Paper No. 163.
  • [5] G. H. Hardy, Divergent Series, Oxford University, Oxford, 1949.
  • [6] H. H. Khan, On the degree of approximation to a function belonging to weighted (Lp , ψ(t)) class, Aligarh Bull. Math. 3/4 (1973/74), 83-88.
  • [7] J. P. King, Almost summable sequences, Proc. Amer. Math. Soc. 17 (1966), 1219-1225.
  • [8] X. Z. Krasniqi, Applications of some classes of sequences on approximation of functions (signals) by almost generalized Nörlund means of their Fourier series, Int. J. Anal. Appl. 9 (2015), 45-53.
  • [9] S. Lal, On the approximation of function belonging to weighted (Lp , ξ(t)) class by almost matrix summability method of its Fourier series, Tamkang J. Math. 35 (2004), no. 1, 67-76.
  • [10] S. Lal and Shireen, Best approximation of functions of generalized Zygmund class by matrix-Euler summability means of Fourier series, Bull. Math. Anal. Appl. 5 (2013), no. 4, 1-13.
  • [11] G. G. Lorentz, A contribution to the theory of divergent sequences, Acta Math. 80 (1948), 167-190.
  • [12] I. J. Maddox, A new type of convergence, Math. Proc. Cambridge Philos. Soc. 83 (1978), no. 1, 61-64.
  • [13] L. McFadden, Absolute Nörlund summability, Duke Math. J. 9 (1942), 168-207.
  • [14] V. N. Mishra and V. V. Sonavane, Error bounds of conjugate of a periodic signal by almost generalized Nörlund means, Thai J. Math. 17 (2019), no. 3, 649-662.
  • [15] S. Nanda, Some sequence spaces and almost convergence, J. Aust. Math. Soc. Ser. A 22 (1976), no. 4, 446-455.
  • [16] H. K. Nigam, Best approximation of conjugate of a function in generalized Zygmund class, Tamkang J. Math. 50 (2019), no. 4, 417-428.
  • [17] E. Z. Psarakis and G. V. Moustakides, An L2-based method for the design of 1-D zero phase FIR digital filters, IEEE Trans. Circuits Systems I Fund. Theory Appl. 44 (1997), no. 7, 591-601.
  • [18] K. Qureshi, On the degree of approximation of a periodic function f by almost Nörlund means, Tamkang J. Math. 12 (1981), no. 1, 35-38.
  • [19] P. Schaefer, Almost convergent and almost summable sequences, Proc. Amer. Math. Soc. 20 (1969), 51-54.
  • [20] K. Sharma, Estimation of error of approximation in Lip(p(t), r) class by (Npq.C1) transform, IAENG Int. J. App. Math. 50 (2020), no. 2, 1-5.
  • [21] K. Sharma, Study of error of approximation of conjugate Fourier series in weighted class by almost Riesz mean, Int. J. Appl. Math. 33 (2020), no. 5, 867-878.
  • [22] Ş. Yıldız, A new factor theorem on absolute matrix summability method, J. Appl. Anal. 28 (2022), no. 1, 83-89.
  • [23] A. Zygmund, Trigonometric Series, 3rd ed., Cambridge University, London, 2002.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-07e84d53-30c2-46b6-9ba3-0b30a3266089
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