2018
Том 70
№ 6

# Best “Continuous” $n$-Term Approximations in the Spaces $S_\phi ^p$

Abstract

We find exact values of upper bounds for the best approximations of $q$-ellipsoids by polynomials of degree $n$ in the spaces $S_\phi ^p$ in the case where the approximating polynomials are constructed on the basis of $n$-dimensional subsystems chosen successively from a given orthonormal system ϕ.

English version (Springer): Ukrainian Mathematical Journal 55 (2003), no. 5, pp 801–811.

Citation Example: Rukasov V. I., Stepanets O. I. Best “Continuous” $n$-Term Approximations in the Spaces $S_\phi ^p$ // Ukr. Mat. Zh. - 2003. - 55, № 5. - pp. 663-670.

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