2019
Том 71
№ 6

All Issues

Kushpel A. K.

Articles: 9
Article (Ukrainian)

Estimation of the widths of classes of smooth functions in the space

Kushpel A. K.

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Ukr. Mat. Zh. - 1990. - 42, № 2. - pp. 279–280

Article (Ukrainian)

Estimates of the diameters of convolution classes in the spaces C and L

Kushpel A. K.

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Ukr. Mat. Zh. - 1989. - 41, № 8. - pp. 1070–1076

Article (Ukrainian)

An estimate of the rate of convergence of the derivative of the interpolation polynomial on classes of differentiable functions

Koval'chuk I. R., Kushpel A. K.

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Ukr. Mat. Zh. - 1988. - 40, № 2. - pp. 231-234

Article (Ukrainian)

A family of extremal subspaces

Kushpel A. K.

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Ukr. Mat. Zh. - 1987. - 39, № 6. - pp. 786-788

Article (Ukrainian)

Convergence rate of fourier series and best approximations in the space Lp

Kushpel A. K., Stepanets O. I.

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Ukr. Mat. Zh. - 1987. - 39, № 4. - pp. 483–492

Article (Ukrainian)

Behavior of Lebesgue constants for linear methods of summing fourier series giving the best order approximation

Kushpel A. K.

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Ukr. Mat. Zh. - 1987. - 39, № 2. - pp. 185-190

Article (Ukrainian)

Interpolation of periodic functions

Kushpel A. K.

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Ukr. Mat. Zh. - 1986. - 38, № 1. - pp. 114–116

Article (Ukrainian)

A method for the approximation of periodic functions

Kushpel A. K.

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Ukr. Mat. Zh. - 1984. - 36, № 6. - pp. 774 – 776

Article (Ukrainian)

A method of reconstruction of differentiate periodic functions by trigonometric polynomials

Kushpel A. K.

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Ukr. Mat. Zh. - 1984. - 36, № 4. - pp. 507 – 512