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14 years 13 days ago
Relative widths of smooth functions determined by fractional order derivatives
For two subsets W and V of a normed space X. The relative Kolmogorov n-width of W relative to V in X is defined by Kn(W, V )X := inf Ln sup f W inf gV Ln f - g X, where the infimu...
Liu Yongping, Yang Lianhong