Approximation by matrix transforms in weighted Orlicz spaces

In this work the approximation problems of the functions by matrix transforms in weighted Orlicz spaces with Muckenhoupt weights are studied.We obtain the degree of approximation of functions belonging to Lipschitz class Lip(α,M,ω) through matrix transforms , and Nörlund means Nn(x,f) of their trigonometric Fourier series.

___

  • [1] Akgun A. Trigonomeric approximation of functions in generalized Lebesgue spaces with variable exponent. Ukrainian Mathematical Journal 2011; 63 (1): 3-23.
  • [2] Akgun A. Polynomial approximation of functions in weighted Lebesgue and Smirnov spaces with nonstandart growth. Georgian Mathematical Journal 2011; 18: 203-235.
  • [3] Akgun R, Israfilov DM. Approximation and moduli of fractional orders in Smirnov-Orlicz classes. Glasnik Matematicki 2008; 43 (63): 121-13
  • [4] Akgun R, Koç H. Simultaneous approximation of functions in Orlicz spaces with Muchenhoupt weights. Complex Variables and Elliptic Equations 2016; 61 (8): 1107-1115.
  • [5] Acerbi E, Mingione G. Regularity results for a class of functions with non-standart growth. Archive for Rational Mechanics and Analysis 2001; 156: 121-140.
  • [6] Böttcher A, Karlovich YI. Carleson curves , Muckenhoupt Weights and Teoplitz Operators. Basel, Switzerland: Birkhauser-Verlag, 1997.
  • [7] Bennett C, Sharpley YI. Interpolation of Operators. Boston, MA, USA: Academic Press, 1988
  • [8] Boyd DW. Spaces between a pair of reflexive Lebesgue spaces. Proceedings American Mathematical Society 1967; 18: 215-219.
  • [9] Boyd DW. Indices of function spaces and their relationship to interpolation. Canadian Mathematical Journal 1969; 21: 1245-1254
  • [10] Boyd DW. İndices for the Orlicz spaces. Pacific Journal of Mathematics 1971; 38: 315-325.
  • [11] Bilalov BT, Seyidova FSh. Basicity of a system of exponents with a piecewise linear phase in Morrey-type spaces. Turkish Journal of Mathematics 2019; 43: 1850-1866.
  • [12] Bilalov BT, Guseynov ZG. Basicity of a system of exponents with a piece-wise linear phase in variable spaces. Mediterranean Journal of Mathematics 2012; 9 (3): 487-498.
  • [13] Bilalov BT, Huseyinli AA, El-Shabrawy SR. Basis properties of trigonometric systems in weighted Morrey spaces. Azerbaijan Journal of Mathematics 2019; 9 (2): 183-209.
  • [14] Colombo M, Mingione G. Regularity for double phase variational problems. Archive for Rational Mechics and Analysis 2015; 215 (2): 443-496
  • [15] Chandra P. Trigonometric approximation of functions in Lp−norm. Journal of Mathematical Analysis and Applications 2002; 277 (1): 13-26.
  • [16] Chandra P. Approximation by Nörlund operators Matematički Vesnik. 1986; 38: 263-259.
  • [17] Chandra P. A note on degre of approximation by Nörlund and Riesz operators Matematički Vesnik. 1990; 42: 9-10.
  • [18] Guven A. Trigonometric approximation of functions in weighted Lpspaces. Sarajevo Journal of Mathematics 2009; 5 (17): 99-108.
  • [19] Guven A. Trigonometric,approximation by matrix transforms in L p(x)space. Analysis and Applications 2012; 10(1): 47-65.
  • [20] Guven A. Approximation in weighted Lpspaces. Revista de la Unión Matemática Argentina 2012; 58 (1): 11-23.
  • [21] Guven A, Israfilov DM. Approximation by Means of Fourier trigonometric series in weighted Orlicz spaces. Advanced Studies in Contemporary Mathematics. (Kyundshang) 2009; 19 (2): 283-295.
  • [22] Guven A, Israfilov DM. Trigonometric approximation in generalized Lebesgue spaces L p(x).Journal of Mathematical Inequalities 2010; 4 (2): 285-299.
  • [23] Guliyeva FA, Sadıgova SR. On some properties of convolution in Morrey type spaces. Azerbaijan Journal of Mathematics 2018: 8 (1): 140-150.
  • [24] Israfilov DM, Guven A. Approximation by trigonometric polynomials in weighted Orlicz spaces. Studia Mathematica 2006: 174 (2): 147-168.
  • [25] Israfilov DM, Tozman NP. Approximation in Morrey-Smirnov classes. Azerbaijan Journal of Mathematics 2011; 1 (1): 99-113.
  • [26] Israfilov DM, Testici A. Approximation by matrix transformation in weighted Lebesgue spaces, with variable exponent. Results in Mathematics 2018; 73 (8): 1-25. 192
  • [27] Jafarov SZ. Approximation by Fejér sums of Fourier trigonometric series in weighted Orlicz spaces. Hacettepe Journal of Mathematics and Statistics 2013; 42 (3): 259-268.
  • [28] Jafarov SZ. Approximation by linear summability neans in Orlicz spaces. Novi Sad Journal of Mathematics 2014: 44 (2): 161-172.
  • [29] Jafarov SZ. Linear methods of summing Fourier series and approximation in weighted variable exponent Lebesgue spaces. Ukrainian Mathematical Journal 2015; 66 (10): 1509-1518.
  • [30] Jafarov SZ. Linear methods of summing Fourier series and approximation in weighted Orlicz spaces. Turkish Journal of Mathematics 2018; 42: 2916-2925.
  • [31] Jafarov SZ. Approximation of functions by de la Vallee-Poissin sums in weighted Orlicz spaces. Arabian Journal of Mathematics 2016; 5: 125-137.
  • [32] Krasnoselskii MA, Rutickii YB. Convex Functions and Orlicz Spaces. Groningen, the Netherlands: Noordhoff Ltd., 1961.
  • [33] Leindler L .Trigonometric approximation in Lp− norm. Journal of Mathematical Analysis and Applications 2005: 302 (1): 129-136.
  • [34] Kokilashvili V, Samko SG. Operators of harmonic analysis in weighted spaces with non-standard growth. Journal of Mathematical Analysis and Applications 2009; 352: 15-34.
  • [35] Karlovich AY. Algebras of Singular integral operators with piecewise continuous coefficients on reflexive Orlicz spaces Mathematische Nachrichten 1996; 179: 187-222.
  • [36] Karlovich AY. Singular integral operators with PC coefficients in reflexive rearrangement invariant spaces. Integral Equations Operator Theory 1998; 32: 436-481
  • [37] Matuszewska W, W. Orlicz W. On certain properties of φ -functions. Bulletin de l’Academie Polonasie des Sciences: Série des Sciences Mathématiques, Astronomiqus et Physiques 1960; 8 (7): 439-443.
  • [38] Maligranda L. Indices and interpolation. Dissertationes Mathematicae 1985; 234.
  • [39] Majewski WA and Labuschange LE. On application of Orlicz spaces to statistical physics. Annales Henri Pioncaré 2014; 15:1197-1221.
  • [40] Muchenhoupt B. Weighted norm inequalities for the Hardy maximal function. Transactiones of the American Mathematical Society 1972; 165: 207-226.
  • [41] Mittal ML, Rhoades BF. On degree of approximation of continuous functions by using linear operators on their Fourier series. International Journal of Mathematics Game Theory, and Algebra. 1999; 9 (4): 259-267.
  • [42] Mittal ML,Rhoades BF, Sonker S, Singh U. Approximation of signals of class Lip(α, p) by linear operators. Applied Mathematics an Computation 2011; 217 (9): 4483-4489.
  • [43] Mittal ML, Mradul VS. Approximation of signals (functions) by trigonometric polynomials in Lp−norm. Hindawi Publishing Corporation. International Journal of Mathematics and Mathematical Sciences, Article ID 267383.
  • [44] Quade ES. Trigonometric approximation in the mean. Duke Mathematical Journal 1937: 3 (3) 529-542.
  • [45] Rao MM, Ren ZD. Theory of Orlicz spaces. New York, NY, USA: Marcel Dekker, 1991.
  • [46] Swierczewska-Gwiazda A. Nonlinear parabolic problems in Musielak- Orlicz spaces. Nonlinear Analysis 2014; 98: 48-65.
  • [47] Sonker S, Singh U. Approximation of signals (functions) belonging to Lip(α, p, ω)−class using trigonometric polynomials. Procedia Engineering 2012; 38: 1575-1585.