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Integrability of Double Cosine Trigonometric Series with coefficients of bounded variation of second order

100%

Krasniqi X. Z.

Commentationes Mathematicae

2011

tom 51

nr 2

In this paper integrability condition for double cosine trigonometric series with coefficients of bounded variation of second order has been obtained. This condition is given explicitly in terms of the coefficients. The result extends a previous result of Telyakovskiı̆ from one dimensional case to two dimensional case.

On the degree of approximation of continuous functions by matrix means related to partial sums of a Fourier series

100%

Krasniqi X. Z.

Commentationes Mathematicae

2012

tom 52

nr 2

In this paper we generalize some results on the degree of approximation of continuous functions by matrix means related to partial sums of a Fourier series, obtained previously by some other authors (please consult references cited in this paper).

Ograniczanie wyników

2 Commentationes Mathematicae

2 Krasniqi X. Z.

1 2012

1 2011

Wyniki wyszukiwania

Integrability of Double Cosine Trigonometric Series with coefficients of bounded variation of second order

On the degree of approximation of continuous functions by matrix means related to partial sums of a Fourier series