Norm inequalities involving upper bounds for certain matrix operators in Orlicz-type sequence spaces

被引:0
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作者
Atanu Manna
机构
[1] Indian Institute of Carpet Technology,Faculty of Mathematics
来源
The Journal of Analysis | 2019年 / 27卷
关键词
Inequality for sums; Weighted Orlicz sequence spaces; Hausdorff matrix; Nörlund matrix; Euler matrix; Fibonacci numbers; Primary 11B39; 26D15; 47A30; Secondary 40G05; 46A45;
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摘要
In this paper, upper bounds of certain matrix operator norms are estimated in Orlicz-type weighted sequence spaces. Three spaces, namely, weighted Orlicz–Euler eλ,φα\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$e_{\lambda , \varphi }^{\alpha }$$\end{document}, weighted Orlicz–Fibonacci Fλ,φ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$F_{\lambda , \varphi }$$\end{document} and weighted Orlicz lφ(λ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$l_\varphi (\lambda )$$\end{document} are considered. Denote ‖A‖X,Y\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Vert A\Vert _{X, Y}$$\end{document} as the operator norm of the matrix A=(an,k)n,k≥0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$A=(a_{n, k})_{n, k\ge 0}$$\end{document} which maps X into Y, where X and Y are two normed sequence spaces. Then the evaluation of upper bounds for ‖A‖lφ(λ),eλ,φα\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Vert A\Vert _{l_\varphi (\lambda ), e_{\lambda , \varphi }^{\alpha }}$$\end{document}, ‖A‖lφ(λ),Fλ,φ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Vert A\Vert _{l_\varphi (\lambda ),F_{\lambda , \varphi }}$$\end{document} and ‖A‖lφ(λ),lφ(μ)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Vert A\Vert _{l_\varphi (\lambda ), l_\varphi (\mu )}$$\end{document}, where A is either Hausdorff or Nörlund matrices is carried out throughout this paper. Some Hardy type formulas are established in case of Hausdorff matrices. Certain inclusion results are also obtained for each of the three sequence spaces. The results obtained in this work strengthen the results recently presented by Lashkaripour and Foroutannia (Proc Indian Acad Sci (Math Sci) 116(3):325–336, 2006) and Talebi and Dehghan (Linear Multilinear Algebra 62(10):1275–1284, 2014; Linear Multilinear Algebra 64(2):196–207, 2016).
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页码:761 / 779
页数:18
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