Kühn, Thomas; Sickel, Winfried; Ullrich, Tino How anisotropic mixed smoothness affects the decay of singular numbers for Sobolev embeddings. (English) Zbl 1470.46058 J. Complexity 63, Article ID 101523, 38 p. (2021). MSC: 46E35 47B06 41A63 PDFBibTeX XMLCite \textit{T. Kühn} et al., J. Complexity 63, Article ID 101523, 38 p. (2021; Zbl 1470.46058) Full Text: DOI arXiv
Cobos, Fernando; Kühn, Thomas; Sickel, Winfried On optimal approximation in periodic Besov spaces. (English) Zbl 1421.42002 J. Math. Anal. Appl. 474, No. 2, 1441-1462 (2019). Reviewer: Yamilet del Carmen Quintana Mato (Caracas) MSC: 42A10 41A25 41A63 46E35 47B99 PDFBibTeX XMLCite \textit{F. Cobos} et al., J. Math. Anal. Appl. 474, No. 2, 1441--1462 (2019; Zbl 1421.42002) Full Text: DOI Link
Kühn, Thomas; Mayer, Sebastian; Ullrich, Tino Counting via entropy: new preasymptotics for the approximation numbers of Sobolev embeddings. (English) Zbl 1404.42004 SIAM J. Numer. Anal. 54, No. 6, 3625-3647 (2016). MSC: 42A10 41A25 46E35 65D15 PDFBibTeX XMLCite \textit{T. Kühn} et al., SIAM J. Numer. Anal. 54, No. 6, 3625--3647 (2016; Zbl 1404.42004) Full Text: DOI arXiv
Kühn, Thomas; Sickel, Winfried; Ullrich, Tino Approximation of mixed order Sobolev functions on the \(d\)-torus: asymptotics, preasymptotics, and \(d\)-dependence. (English) Zbl 1485.47025 Constr. Approx. 42, No. 3, 353-398 (2015). MSC: 47B06 42A10 41A25 41A63 46E35 65D15 PDFBibTeX XMLCite \textit{T. Kühn} et al., Constr. Approx. 42, No. 3, 353--398 (2015; Zbl 1485.47025) Full Text: DOI arXiv