Transfinite thin plate spline interpolation

Details Transfinite thin plate spline interpolation Transfinite thin plate spline interpolation

2009-10-08

arxiv.org/abs/0910.1507v1

Constr. Approx. 34, No. 2 (2011), 237--256

Mathematics

Numerical Analysis

Scientific paper

10.1007/s00365-010-9118-3

Duchon's method of thin plate splines defines a polyharmonic interpolant to scattered data values as the minimizer of a certain integral functional. For transfinite interpolation, i.e. interpolation of continuous data prescribed on curves or hypersurfaces, Kounchev has developed the method of polysplines, which are piecewise polyharmonic functions of fixed smoothness across the given hypersurfaces and satisfy some boundary conditions. Recently, Bejancu has introduced boundary conditions of Beppo Levi type to construct a semi-cardinal model for polyspline interpolation to data on an infinite set of parallel hyperplanes. The present paper proves that, for periodic data on a finite set of parallel hyperplanes, the polyspline interpolant satisfying Beppo Levi boundary conditions is in fact a thin plate spline, i.e. it minimizes a Duchon type functional.

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