Abstract
In this article we investigate the rate of the approximation by Cesàro means of the quadratical partial sums of double Walsh-Kaczmarz-Fourier series of a function in the Lebesgue space over the Walsh group. The approximation properties of Cesàro means of negative order of one- and two-dimensional Walsh-Fourier series was discussed earlier by Goginava.
Citation
Károly Nagy. "Approximation by Cesàro means of negative order of double Walsh-Kaczmarz-Fourier series." Tohoku Math. J. (2) 64 (3) 317 - 331, 2012. https://doi.org/10.2748/tmj/1347369366
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