ON NON-LINEAR APPROXIMATIONS OF PERIODIC FUNCTIONS OF BESOV CLASSES USING WAVELET DECOMPOSITIONS
MAI XUAN THAO
Abstract
In the present paper, we extend results of Dinh Dung [5] on nonlinear $n$-term $L_q$-approximation and non-linear widths to the Besov class $SB^{\omega}_{p,\theta}$ where $1\leq p, q\leq \infty, 0 < \theta \leq \infty$, and $\omega$ is a given function of modulus of smoothness type.