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Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series

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CONJUGATE FUNCTIONS ON A SEGMENT AND RELATIONS FOR THEIR BEST UNIFORM POLYNOMIAL APPROXIMATIONS

Abstract

A relation between the best polynomial approximations of the function assigned on a segment and the function conjugated to it is found. In the periodic case, a similar relation is obtained by S. B. Stechkin. The inequality of G. Szegö type is also proved for the derivatives of an algebraic polynomial.

About the Authors

V. R. Misiuk
Yanka Kupala State University of Grodno
Belarus


A. A. Pekarskii
Belarusian State University, Minsk
Belarus


References

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ISSN 1561-2430 (Print)
ISSN 2524-2415 (Online)