On relative widths of classes of differentiable functions. III
Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 17 (2011) no. 3, pp. 300-302
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A lower estimate is established for the minimum value of the factor $M$ for which the Kolmogorov width $d_n(W_C^r,C)$ and the relative width $K_n(W_C^r,MW_C^j,C)$ of the class of functions $W_C^r$ with respect to the class $MW^j_C$ coincide for $j>r$. The order of this estimate with respect to $n$ is the same as in the upper estimate obtained earlier.
Keywords: comparison functions, Kolmogorov and relative widths.
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Yu. N. Subbotin; S. A. Telyakovskii. On relative widths of classes of differentiable functions. III. Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 17 (2011) no. 3, pp. 300-302. http://geodesic.mathdoc.fr/item/TIMM_2011_17_3_a29/

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