On the (bi)infinite case of Shadrin's theorem concerning the \(L_{\infty}\)-boundedness of the \(L_{2}\)-spline projector
\textit{A. Yu. Shadrin} in [Acta Math. 187, No. 1, 59--137 (2001; Zbl 0996.41006)] proved the de Boor conjecture. That is, he proved that the \(L_\infty\) norm of the \(L_2\)-spline projector is bounded independently of the knot sequence. In the present paper the author ties up some loose ends in Shadrin's remarkable proof.
scientific article; zbMATH DE number 6345599