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Fourier sums for the Banach indicatrix
K. I. Oskolkov Steklov Mathematical Institute, Academy of Sciences of the USSR
Abstract:
We prove the existence of a function $f(t)$, which is continuous on the interval $[0,1]$, is of bounded variation, $\min f(t)=0$, $\max f(t)=1$, for which the integral
$$
I(x)=\frac1\pi\int_0^\infty\biggl[\int_0^1\cos y(f(t)-x)|df(t)|\biggr]\,dy
$$
diverges for almost all $x\in[0,1]$. This result gives a negative answer to a question posed by Z. Ciesielski.
Received: 02.11.1973
Citation:
K. I. Oskolkov, “Fourier sums for the Banach indicatrix”, Mat. Zametki, 15:4 (1974), 527–532; Math. Notes, 15:4 (1974), 309–312
Linking options:
https://www.mathnet.ru/eng/mzm7375 https://www.mathnet.ru/eng/mzm/v15/i4/p527
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Abstract page: | 198 | Full-text PDF : | 101 | First page: | 1 |
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