Trigonometric and linear widths for the classes of periodic multivariable functions by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Estimates for the best bilinear approximations of the classes $B^r_{p,\theta}$ and singular numbers of integral operators by Romanyuk, A. S., Romanyuk, V. S., Романюк, А. С., Романюк, В. С., Романюк, А. С., Романюк, В. С.

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Entropy numbers and the widths of the classes $B_{p,θ}^r$ of periodic functionsof many variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Estimation of the Entropy Numbers and Kolmogorov Widths for the Nikol’skii–Besov Classes of Periodic Functions of Many Variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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On the Problem of Linear Widths of the Classes $B_{p,θ}^r$ of Periodic Functions of Many Variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Best Bilinear Approximations for the Classes of Functions of Many Variables by Romanyuk, A. S., Romanyuk, V. S., Романюк, А. С., Романюк, В. С., Романюк, А. С., Романюк, В. С.

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Best bilinear approximations of functions from Nikolskii-Besov classes by Romanyuk, A. S., Romanyuk, V. S., Романюк, А. С., Романюк, В. С., Романюк, А. С., Романюк, В. С.

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Asymptotic estimates for the best trigonometric and bilinear approximations of classes of functions of several variables by Romanyuk, A. S., Romanyuk, V. S., Романюк, А. С., Романюк, В. С., Романюк, А. С., Романюк, В. С.

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Approximative characteristics of the isotropic classes of periodic functions of many variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Trigonometric and orthoprojection widths of classes of periodic functions of many variables by Romanyuk, A. S., Romanyuk, V. S., Романюк, А. С., Романюк, В. С., Романюк, А. С., Романюк, В. С.

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Best approximations of the classes $B_{p,\,\theta}^{r}$ of periodic functions of many variables in uniform metric by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Approximation of Classes $B_{p,θ}^r$ by Linear Methods and Best Approximations by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Linear Widths of the Besov Classes of Periodic Functions of Many Variables. I by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Linear Widths of the Besov Classes of Periodic Functions of Many Variables. II by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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On Estimates of the Kolmogorov Widths of the Classes $B_{p,θ}^r$ in the Space $L_q$ by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Estimates for Approximation Characteristics of the Besov Classes $B_ r^{p,θ}$ of Periodic Functions of Many Variables in the Space $L_q. I$ by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Trigonometric widths of the classes $B_{p,θ}^ r$ of functions of many variables in the space $L_q$ by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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On estimates of approximation characteristics of the Besov classes of periodic functions of many variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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Approximation of classes of functions of many variables by their orthogonal projections onto subspaces of trigonometric polynomials by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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On the best approximations and Kolmogorov widths of besov classes of periodic functions of many variables by Romanyuk, A. S., Романюк, А. С., Романюк, А. С.

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