Rudolph A. Lorentz (auth.)3540558705, 9783540558705, 0387558705
The subject of this book is Lagrange, Hermite and Birkhoff (lacunary Hermite) interpolation by multivariate algebraic polynomials. It unifies and extends a new algorithmic approach to this subject which was introduced and developed by G.G. Lorentz and the author. One particularly interesting feature of this algorithmic approach is that it obviates the necessity of finding a formula for the Vandermonde determinant of a multivariate interpolation in order to determine its regularity (which formulas are practically unknown anyways) by determining the regularity through simple geometric manipulations in the Euclidean space. Although interpolation is a classical problem, it is surprising how little is known about its basic properties in the multivariate case. The book therefore starts by exploring its fundamental properties and its limitations. The main part of the book is devoted to a complete and detailed elaboration of the new technique. A chapter with an extensive selection of finite elements follows as well as a chapter with formulas for Vandermonde determinants. Finally, the technique is applied to non-standard interpolations. The book is principally oriented to specialists in the field. However, since all the proofs are presented in full detail and since examples are profuse, a wider audience with a basic knowledge of analysis and linear algebra will draw profit from it. Indeed, the fundamental nature of multivariate nature of multivariate interpolation is reflected by the fact that readers coming from the disparate fields of algebraic geometry (singularities of surfaces), of finite elements and of CAGD will also all find useful information here. |
Table of contents :
Introduction….Pages 1-3
Univariate interpolation….Pages 4-8
Basic properties of Birkhoff interpolation….Pages 9-22
Singular interpolation schemes….Pages 23-49
Shifts and coalescences….Pages 50-61
Decomposition theorems….Pages 62-71
Reduction….Pages 72-74
Examples….Pages 75-89
Uniform Hermite interpolation of tensor-product type….Pages 90-102
Uniform Hermite interpolation of type total degree….Pages 103-138
Vandermonde determinants….Pages 139-155
A theorem of Severi….Pages 156-161
Kergin interpolation via Birkhoff interpolation….Pages 162-170 |
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