On the best approximation by "angles" in the mean on the plane R2 with the Chebyshev-Hermite weight von S. B. Vakarchuk, A. V. Shvachko

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On the Best Approximation in the Mean by Algebraic Polynomials with Weight and the Exact Values of Widths for the Classes of Functions von S. B. Vakarchuk, A. V. Shvachko

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On the approximation in the mean with the Chebyshev-Hermite weight by algebraic polynomials on the real axis von S. B. Vakarchuk, A. V. Shvachko

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