Rohwer, C. H. Quasi-inverses and approximation with min-max operators in the \(\ell_1\)-norm. (English) Zbl 1114.41015 Quaest. Math. 29, No. 2, 141-150 (2006). Reviewer: Yuly Makovoz (Lowell) MSC: 41A46 41A99 65D10 PDFBibTeX XMLCite \textit{C. H. Rohwer}, Quaest. Math. 29, No. 2, 141--150 (2006; Zbl 1114.41015) Full Text: DOI
Rohwer, C. H. Variation reduction and \(LU LU\)-smoothing. (English) Zbl 1021.41020 Quaest. Math. 25, No. 2, 163-176 (2002). Reviewer: Wolfgang W.Breckner (Cluj-Napoca) MSC: 41A99 41A46 65D10 PDFBibTeX XMLCite \textit{C. H. Rohwer}, Quaest. Math. 25, No. 2, 163--176 (2002; Zbl 1021.41020) Full Text: DOI