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41A46 Approximation by arbitrary nonlinear expressions; widths and entropy (4 articles)

• Schmeisser, Hans-Jürgen: Recent developments in the theory of function spaces with dominating mixed smoothness. (English). In: Rákosník, Jiří (ed.): Nonlinear Analysis, Function Spaces and Applications, Proceedings of the Spring School held in Prague, May 30-June 6, 2006. Vol. 8. Institute of Mathematics of the Academy of Sciences of the Czech Republic, Praha, 2007. pp. 145-204
• Stynes, Martin; Kellogg, R. Bruce: $N$-widths for singularly perturbed problems. (English). Mathematica Bohemica, vol. 127 (2002), issue 2, pp. 343-352
• Stynes, Martin; Kellogg, R. Bruce: $N$-widths for singularly perturbed problems. (English). In: Krbec, M. and Kuben, J. (eds.): Proceedings of Equadiff 10, Czechoslovak International Conference on Differential Equations and Their Applications, Prague, August 27-31, 2001. [Part 1] Invited Lectures. Masaryk University, Brno, 2002. pp. 197-205
• Edmunds, D. E.; Sun, Jiong: Approximation and entropy numbers of embeddings in weighted Orlicz spaces. (English). Mathematica Bohemica, vol. 116 (1991), issue 3, pp. 281-295