Paper Info
Title
Multivariate Rational Interpolation of Scattered Data
Abstract
Rational data fitting has proved extremely useful in a number of scientific applications. We refer among others to its use in some network problems [6, 7, 15, 16], to the modelling of electro-magnetic components [20,13], to model reduction of linear shift-invariant systems [2, 3,8] and so on. When computing a rational interpolant in one variable, all existing techniques deliver the same rational function, because all rational functions that satisfy the interpolation conditions reduce to the same unique irreducible form. When switching from one to many variables, the situation is entirely different. Not only does one have a large choice of multivariate rational functions, but moreover, different algorithms yield different rational interpolants and apply to different situations. The rational interpolation of function values that are given at a set of points lying on a multidimensional grid, has extensively been dealt with in [11, 10, 5]. The case where the interpolation data are scattered in the multivariate space, is far less discussed and is the subject of this paper. We present a fast solver for the linear block Cauchy-Vandermonde system that translates the interpolation conditions, and combine it with an interval arithmetic verification step.
Year
DOI
Venue
2003
10.1007/978-3-540-24588-9_22
LECTURE NOTES IN COMPUTER SCIENCE
Keywords
Field
DocType
interval arithmetic,rational function,electro magnetic,data fitting,satisfiability
Elliptic rational functions,Applied mathematics,Interpolation,Trilinear interpolation,Linear interpolation,Rational point,Rational function,Calculus,Polynomial and rational function modeling,Mathematics,Bilinear interpolation
Conference
Volume
ISSN
Citations 
2907
0302-9743
4
PageRank 
References 
Authors
0.57
5
3
Name
Order
Citations
PageRank
Stefan Becuwe1144.28
Annie Cuyt216141.48
Brigitte M. Verdonk38727.05