Estimates for the Spectral Condition Number of Cardinal B-Spline Collocation Matrices (Long version)

Details Estimates for the Spectral Condition Number of Cardinal B-Spline Collocation Matrices (Long version) Estimates for the Spectral Condition Number of Cardinal B-Spline Collocation Matrices (Long version)

2010-04-22

arxiv.org/abs/1004.4014v1

Math. Commun. 15 (2010) 503-519

Mathematics

Numerical Analysis

Short version submitted for publication in Mathematical Communications.

Scientific paper

The famous de Boor conjecture states that the condition of the polynomial B-spline collocation matrix at the knot averages is bounded independently of the knot sequence, i.e., depends only on the spline degree. For highly nonuniform knot meshes, like geometric meshes, the conjecture is known to be false. As an effort towards finding an answer for uniform meshes, we investigate the spectral condition number of cardinal B-spline collocation matrices. Numerical testing strongly suggests that the conjecture is true for cardinal B-splines.

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