Kolmogorov widths of an intersection of Besov classes with dominating mixed smoothness in a Besov space

Abstract

In this paper, we obtain order estimates for the Kolmogorov widths of an intersection of a finite family of Besov classes $SB_{p_j,θ_j}^{\overline{r}_j}(\mathbb{T}^d)$ with dominating mixed smoothness in a Besov space $B_{q,σ}^{\overline{l}}(\mathbb{T}^d)$ in the case $2<q, \, σ<\infty$ when the parameters satisfy certain conditions of general position.