On the Best Polynomial Approximations of 2-Periodic Functions and Exact Values of n -Widths of Functional Classes in the Space L 2

By Vakarchuk S.B.  

Ukrainian Mathematical Journal, Vol. 54, Iss. 12, 2002-12 ,pp. : 1943-1957

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Best Approximations and Widths of Classes of Convolutions of Periodic Functions of High Smoothness

By Serdyuk A.  

Ukrainian Mathematical Journal, Vol. 57, Iss. 7, 2005-07 ,pp. : 1120-1148

Springer Publishing Company

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Best Approximations and Kolmogorov and Trigonometric Widths of the Classes B p, Ω of Periodic Functions of Many Variables

By Stasyuk S.  

Ukrainian Mathematical Journal, Vol. 56, Iss. 11, 2004-11 ,pp. : 1849-1863

Springer Publishing Company

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Best Orthogonal Trigonometric Approximations of Classes of Functions of Many Variables L, p

By Konsevich N.M.  

Ukrainian Mathematical Journal, Vol. 53, Iss. 1, 2001-01 ,pp. : 26-34

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Estimates of the Best M-Term Trigonometric Approximations of the Classes L, p of Periodic Functions of Many Variables in the Space Lq

By Konsevich N.M.  

Ukrainian Mathematical Journal, Vol. 52, Iss. 7, 2000-07 ,pp. : 1029-1039

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