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Kolmogorov and Linear Widths of Weighted Sobolev-Type Classes on a Finite Interval, II
Authors:V. N. Konovalov  D. Leviatan  
Affiliation:International Mathematical Center, National Academy of Sciences of Ukraine, Kiev, 01601, Ukrainef1;School of Mathematical Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel, f2;IMI, Department of Mathematics, University of South Carolina, Columbia, South Carolina, 29208, U.S.A., f3
Abstract:Let I be a finite interval, r and ρ(t)=dist{t, ∂I}, tI. Denote by Δs+Wrpα, 0α<∞, the class of functions x on I with the seminorm x(r)ραLp1 for which Δsτx, τ>0, is nonnegative on I. We obtain two-sided estimates of the Kolmogorov widths dn(Δs+Wrpα)Lq and of the linear widths dn(Δs+Wrpα)linLq, s=0, 1, …, r+1.
Keywords:widths of Sobolev-type classes   Kolmogorov widths   linear widths
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