“…There are many appearances of the assumption (1) in the literature. Besides the detailed study of certain weighted Hilbert spaces of analytic functions [8,24,25,30,47], it appears naturally in the context of approximation with (increasingly flat) Gaussian kernels [12,17,26,41], or in tensor product approximations [14,16], or for certain smoothness spaces on complex spheres [7]. Moreover, it is a typical assumption for the construction of greedy bases [4,5,15].…”