Rate of Convergence and Tractability of the Radial Function Approximation Problem

Gregory E. Fasshauer, Fred J. Hickernell, Henryk Woźniakowski

This article studies the problem of approximating functions belonging to a Hilbert space $H_d$ with an isotropic or anisotropic Gaussian reproducing kernel, $$ K_d(\bx,\bt) = \exp\…