# Rectangular summation of multiple Fourier series and multi-parametric capacity

@article{Perfekt2019RectangularSO, title={Rectangular summation of multiple Fourier series and multi-parametric capacity}, author={Karl-Mikael Perfekt}, journal={arXiv: Classical Analysis and ODEs}, year={2019} }

We consider the class of multiple Fourier series associated with functions in the Dirichlet space of the polydisc. We prove that every such series is summable with respect to unrestricted rectangular partial sums, everywhere except for a set of zero multi-parametric logarithmic capacity. Conversely, given a compact set in the torus of zero capacity, we construct a Fourier series in the class which diverges on this set, in the sense of Pringsheim. We also prove that the multi-parametric… CONTINUE READING

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