Bernstein–Nikol'skii-type inequalities for trigonometric polynomials with an arbitrary choice of harmonics von H. M. Vlasyk

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Order estimates of the Lq-norms of generalized derivatives of the Dirichlet-type kernels with an arbitrary choice of harmonics von H. M. Vlasyk

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Kolmogorov widths of the classes LΨ (β,ρ) of periodic functions in the space Lq von H. M. Vlasyk

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Estimates of norms of generalized derivatives of the Dirichlet type kernels with arbitrary choice of harmonics von H. M. Vlasyk

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Estimates of orthoprojective widths of the classes Lβ, p Ψ of periodic functions in the space Lq von H. M. Vlasyk

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Orthoprojective widths of classes Lшв,p of periodic functions in the space Lq von H. M. Vlasyk

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Estimates of the best orthogonal trigonometric approximations and orthoprojective widths of the classes of periodic functions of many variables in a uniform metric von H. M. Vlasyk, V. V. Shkapa, I. V. Zamrii

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