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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. LOMI, 1984 Volume 135, Pages 69–75 (Mi znsl4757)

This article is cited in 2 papers

Remarks on correcting

S. V. Kislyakov


Abstract: The paper consists of two sections. In the first one it is proved that any bounded non-nogative lower semi-continuous function on the unit circle is the modulus of some function with uniformly bounded Fourier sums. In the second section a simple proof of the following known result is presented: given a measurable function $f$ on the unit circle and $\varepsilon>0$, a function can be found so that $m\{f\ne g\}<\varepsilon$ and the Fourier series of ($g$ with respect to the trigonometric system and to the Walsh system converge uniformly.

UDC: 8.270.72+339



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