Geometric weakly admissible meshes, discrete least squares approximations and approximate Fekete points

Using the concept of Geometric Weakly Admissible Meshes (see §2 below) together with an algorithm based on the classical QR factorization of matrices, we compute efficient points for discrete multivariate least squares approximation and Lagrange interpolation. 2000 AMS subject classification: 41A10, 41A63, 65D05, 65D15, 65Y20.

• Type: Journal
• Year: 2011
• Where: MOC
• Authors: Len Bos, Jean-Paul Calvi, Norman Levenberg, Alvise Sommariva, Marco Vianello
• Keywords: Admissible Meshes, Classical Qr Factorization, Intelligent Agents, Lagrange Interpolation, MOC 2011