{ "id": "1410.6721", "version": "v1", "published": "2014-10-05T02:42:33.000Z", "updated": "2014-10-05T02:42:33.000Z", "title": "On the maximal operators of Walsh-Kaczmarz-Fejér means", "authors": [ "George Tephnadze" ], "comment": "Walsh-Kaczmarz system, Fej\\'er means, martingale Hardy space", "journal": "Periodica Mathematica Hungarica, 67, (1), 2013, 33-45", "doi": "10.1007/s10998-013-4617-1", "categories": [ "math.CA", "math.FA" ], "abstract": "The main aim of this paper is to prove that the maximal operator $\\sigma_{p}^{\\kappa ,\\ast }f:=\\sup_{n\\in \\mathbf{P}}\\left\\vert \\sigma_{n}^{\\kappa }f\\right\\vert /\\left( n+1\\right) ^{1/p-2}$ is bounded from the Hardy space $% H_{p}$ to the space $L_{p},$ for $0