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On the divergence of double Fourier–Walsh and Fourier–Walsh–Kaczmarz series of continuous functions
Acta Mathematica Hungarica ( IF 0.9 ) Pub Date : 2021-02-05 , DOI: 10.1007/s10474-020-01113-7 R. Getsadze
中文翻译:
关于连续函数的双重傅里叶-沃尔什和傅里叶-沃尔什-Kaczmarz级数的散度
更新日期:2021-02-05
Acta Mathematica Hungarica ( IF 0.9 ) Pub Date : 2021-02-05 , DOI: 10.1007/s10474-020-01113-7 R. Getsadze
We prove that there exists a continuous function on \([0,1]^2\), with a certain smoothness, whose double Fourier–Walsh series diverges on a set of positive measure by rectangles. Similar theorem is proved also for the double Walsh–Kaczmarz system.
中文翻译:
关于连续函数的双重傅里叶-沃尔什和傅里叶-沃尔什-Kaczmarz级数的散度
我们证明在\([0,1] ^ 2 \)上存在一个具有一定平滑度的连续函数,其双傅里叶-沃尔什级数在一组由矩形组成的正度量上发散。双沃尔什-卡茨马尔兹系统也证明了类似的定理。