We are concerned with an approximation problem by polynomial spline functions with one free knot. Our main concern is a second-order property of the problem with respect to the knot. We show that every spline function satisfying Braess's alternation condition is nearly optimal. 1994 Academic Press.
A Construction of Biorthogonal Functions to B-Splines with Multiple Knots
β Scribed by N. Dyn
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 71 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1063-5203
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β¦ Synopsis
We present a construction of a refinable compactly supported vector of functions which is biorthogonal to the vector of B-splines of a given degree with multiple knots at the integers with prescribed multiplicity. The construction is based on Hermite interpolatory subdivision schemes, and on the relation between B-splines and divided differences. The biorthogonal vector of functions is shown to be refinable, with a mask related to that of the Hermite scheme. For simplicity of presentation the special (scalar) case, corresponding to B-splines with simple knots, is treated separately.
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