Affiliation: | Center for Approximation Theory, Texas A&M University, College Station, TX 77843, U.S.A. Fachbereich Mathematik, Universität Duisburg, Duisburg, Germany |
Abstract: | In this paper, we investigate the existence and uniqueness of cardinal interpolants associated with functions arising from the kth order iterated discrete Laplacian k applied to certain radial basis functions. In particular, we concentrate on determining, for a given radial function Φ, which functions kΦ give rise to cardinal interpolation operators which are both bounded and invertible ?2 (Z3). In addition to solving the cardinal interpolation problem (CIP) associated with such functions kΦ, our approach provides a unified framework and simpler proofs for the CIP associated with polyharmonic splines and Hardy multiquadrics. |