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L1-approximation of Fourier series of complex-valued functions

Published online by Cambridge University Press:  14 November 2011

T. F. Xie
Affiliation:
Department of Malhematics, Hangzhou University, Hangzhou, Zhejiang 310028, People's Republic of China
S. P. Zhou
Affiliation:
Department of Mathematics, Statistics and Computing Science, Dalhousie University, Halifax, NS, Canada, B3 3J5

Extract

V. B. Stanojevic suggested in her recent paper that it would be of interest to prove a corresponding L1-convergence theorem for Fourier series with complex O-regularly varying quasimonotonc coefficients. The present paper will discuss this question and establish L1-convergence and. furthermore. L1-approximation theorems for complex-valued integrable functions.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1996

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References

1Bary, W. O. and Stanojevic, Č.V.. On weighted integrability of trigonometric seriesand L1-convergence of Fourier series. Proc. Amer. Math. Soc. 96 (1986), 5361.Google Scholar
2Karamata, J.. Sur un mode de croissance régulière des fonctions. Mathematica (Cluj) 4 (1930), 3853.Google Scholar
3Stanojevic, V. B.. L1-convergence of Fourier series with complex quasimonotone coefficients. Proc. Amer. Math. Soc. 86 (1982), 241–7.Google Scholar
4Stanojevic, V. B.. Convergence of Fourier series with complex quasimonotone coefficients of bounded variation of order m. J. Math. Anal Appl. 115 (1986), 482505.CrossRefGoogle Scholar
5Stanojevic, V. B.. L1-convergence of Fourier series with complex quasimonotone coefficients. Acad.Serbe Sci. Arts Glas 346 (1986), 2948.Google Scholar
6Stanojevic, V. B.. L1-convergence of Fourier series with O-regularly varying quasimonotone coefficients. J. Approx. Theory 60 (1990), 168–73.CrossRefGoogle Scholar
7Telyakovskii, S. A. and Fomin, G. A.. On the convergence in the L metric of Fourierseries with quasimonotone coefficients. Proc. Steklov Inst. Math. 134 (1975), 351–5.Google Scholar
8Zygmund, A.. Trigonometric Series (Cambridge: Cambridge University Press, 1959).Google Scholar