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  • 1 Tbilisi State University Institute of Mathematics, Faculty of Exact and Natural Sciences Chavchavadze str. 1 Tbilisi 0128 Georgia
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Abstract  

The main aim of this paper is to prove that there exists a martingale fH12/▭ such that the restricted maximal operators of Fejér means of twodimensional Walsh-Fourier series and conjugate Walsh-Fourier series does not belong to the space weak-L1/2.