Best $M$-term trigonometric approximations of Besov classes of periodic functions of several variables

A. S. Romanyuk

Izvestiya. Mathematics , Tome 67 (2003) no. 2, pp. 265-302.

Résumé

We obtain order-exact estimates for the best $M$-term trigonometric approximations of the Besov classes $B_{p,\theta}^r$ of periodic functions of several variables in $L_q$ with certain relations between $p$ and $q$.

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