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 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 Polynomial Approximations in L 2 and Widths of Some Classes of Functions

By Vakarchuk S.   Shchitov A.  

Ukrainian Mathematical Journal, Vol. 56, Iss. 11, 2004-11 ,pp. : 1738-1747

Springer Publishing Company

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On the Exact Asymptotics of the Best Relative Approximations of Classes of Periodic Functions by Splines

By Parfinovich N.V.  

Ukrainian Mathematical Journal, Vol. 53, Iss. 4, 2001-04 ,pp. : 555-568

Springer Publishing Company

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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

Springer Publishing Company

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