Multivariate Approximation Theory II

Some remarks on product approximations. - Approximation theory on a snowflake. - Estimates and bounds for the doubly perturbed eigenvalue problem. - Remarks on reduced Hermite interpolation. - Ein Beispiel zur Theorie der besten Approximation. - On spaces of piecewise polynomials with boundary conditions. I. Rectangles. - Some remarks on multivariate B-splines. - On discrete trivariate blending interpolation. - On precision sets of interpolation projectors. - Which closed convex subsets of an inner product space are Chebyshev? . - Interpolation methods for numerical analytic continuation. - Blending-Splines auf Dreiecksnetzen. - Remainder terms in numerical integration formulas of the sphere. - A generalized Sylvester s identity on determinants and its applications to interpolation problems. - Biorthogonality in approximation. - Cubature remainder and biorthogonal systems. - Product approximation: Error estimates. - A Lagrangian method for multivariate continuous Chebyshev approximation problems. - Construction of surfaces of class &k on a domain ? C ? 2, after triangulation. - Minimal projections and near-best approximations by multivariate polynomial expansion and interpolation. - Sharp a priori error bounds for polynomial approximation in Sobolev spaces. - An immediate construction of numerical integration and differentiation formulae. - On the approximation by multiple orthogonal series. - Quantitative theorems on approximation processes of positive linear operators. - Some relationships between surface splines and Kriging. - A view of mathematics. - Drei statt einer reellen Variablen? . - Eine Methode zur Konstruktion von c1-Flächen zur Interpolation unregelmässig verteilter Daten. - Approximation theory and domain of dependence for P. D. E. of hyperbolic type. - Properties ofspline projections. - A survey of recent results on approximation theory in China. - Vector splines on the sphere, with application to the estimation of vorticity and divergence from discrete, noisy data.