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On some properties of multiple conjugate trigonometric series
Authors:D Leladze
Institution:(1) Faculty of Mechanics and Mathematics, I. Javakhishvili Tbilisi State University, 2, University St., 380043 Tbilisi, Republic of Georgia
Abstract:We have obtained an estimate, in terms of partial and mixed moduli, of the continuity of deviation of the Cesáro (C, agr) means (agr = (agr1,...,agrn),agriisin Ropf, agr1 > –1, 
$$i = \overline {1,n} $$
) of the sequence of rectangular partial sums ofn-multiple (n>1) conjugate trigonometric series from then-multiple truncated conjugate function. This estimate implies the result on them lambda-convergence (lambdage1) of (C, agr) means (agr1 > 0, 
$$i = \overline {1,n} $$
) provided that the essential conditions are imposed on the partial moduli of continuity. Finally, it is shown that them lambda-convergence cannot be replaced by ordinary convergence.
Keywords:42B08
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