We investigate the behavior of deviations of rectangular partial Fourier sums on sets of \(\bar \psi\)-differentiable functions of many variables.
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Lasuriya, R.A. Multiple Fourier Sums on Sets of \(\bar \psi\)-Differentiable Functions (Low Smoothness). Ukrainian Mathematical Journal 55, 1099–1109 (2003). https://doi.org/10.1023/B:UKMA.0000010608.22181.d0
- Differentiable Function