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Approximation by Trigonometric Polynomials in the Variable Exponent Weighted Morrey Spaces   
Yazarlar
Zeynep Cakir
Canay Aykol Kocakuşaklı
Ankara Üniversitesi, Türkiye
Prof. Dr. Vagıf GULIYEV Prof. Dr. Vagıf GULIYEV
Kütahya Dumlupınar Üniversitesi, Türkiye
Ayhan Şerbetçi
Ankara Üniversitesi, Türkiye
Özet
In this paper we investigate the best approximation by trigonometric polynomials in the variable exponent weighted Morrey spaces Mp(⋅),λ(⋅)(I0,w), where w is a weight function in the Muckenhoupt Ap(⋅)(I0) class. We get a characterization of K-functionals in terms of the modulus of smoothness in the spaces Mp(⋅),λ(⋅)(I0,w). Finally, we prove the direct and inverse theorems of approximation by trigonometric polynomials in the spaces Mp(⋅),λ(⋅)(I0,w), the closure of the set of all trigonometric polynomials in Mp(⋅),λ(⋅)(I0,w).
Anahtar Kelimeler
Fourier series | L-method of summation | Method of regularization
Makale Türü Özgün Makale
Makale Alt Türü Uluslararası alan indekslerindeki dergilerde yayımlanan tam makale
Dergi Adı Carpathian Mathematical Publications
Dergi ISSN ISSN-2075
Dergi Tarandığı Indeksler MathSciNet
Makale Dili İngilizce
Basım Tarihi 12-2021
Cilt No 13
Sayı 3
Sayfalar 750 / 763
Doi Numarası 10.15330/cmp.13.3.750-763
Makale Linki https://journals.pnu.edu.ua/index.php/cmp/article/view/4798/5994