Dahmen, Wolfgang Approximation by linear combinations of multivariate B-splines. (English) Zbl 0487.41012 J. Approximation Theory 31, 299-324 (1981). MSC: 41A15 41A45 PDFBibTeX XMLCite \textit{W. Dahmen}, J. Approx. Theory 31, 299--324 (1981; Zbl 0487.41012) Full Text: DOI
Dahmen, W.; Görlich, E. The characterization problem for best approximation with exponential error orders and evaluation of entropy. (English) Zbl 0324.41006 Math. Nachr. 76, 163-179 (1977). MSC: 41A25 41A50 42A10 41A45 30B60 PDFBibTeX XMLCite \textit{W. Dahmen} and \textit{E. Görlich}, Math. Nachr. 76, 163--179 (1977; Zbl 0324.41006) Full Text: DOI