Original scientific paper

On construction of fourth order Chebyshev splines

M. Rogina

Abstract

It is an important fact that general families of Chebyshev and L-splines
can be locally represented, i.e. there exists a basis of B-splines
which spans the entire space. We develop a special technique to calculate with 4^{th}order Chebyshev splines of minimum deficiency on nonuniform meshes, which leads to a numerically stable algorithm, at least in case one special Hermite interpolant can be constructed by stable explicit formulae .
The algebraic derivation of the algorithm involved makes it possible to
apply the constructionto L-splines. The underlying idea is an Oslo type algorithm, combined with the known derivative formula for hebyshev splines.
We then show that weighted polynomial and tension spline spaces satisfy the conditions imposed, and show how to apply the above general techniques to obtain local representations.

Keywords

Chebyshev spline; B-spline; knot insertion; recurrence

Hrčak ID:

1740

URI

https://hrcak.srce.hr/1740

Publication date:

20.6.1999.

Visits: 2.071 *