Scattered date interpolation from principal shift-invariant spaces

  • Authors:
  • Michael J. Johnson

  • Affiliations:
  • Department of Mathematics and Computer Science, Kuwait University, Safat, Kuwait

  • Venue:
  • Journal of Approximation Theory
  • Year:
  • 2001

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Abstract

Under certain assumptions on the compactly supported function φ ∈ C(Rd), we propose two methods of selecting a function s from the scaled principal shift-invariant space Sh(φ) such that s interpolates a given function f at a scattered set of data locations. For both methods, the selection scheme amounts to solving a quadratic programming problem and we are able to prove error estimates similar to those obtained by Duchon for surface spline interpolation.