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Bivariate hierarchical Hermite spline quasi-interpolation

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Abstract

Spline quasi-interpolation (QI) is a general and powerful approach for the construction of low cost and accurate approximations of a given function. In order to provide an efficient adaptive approximation scheme in the bivariate setting, we consider quasi-interpolation in hierarchical spline spaces. In particular, we study and experiment the features of the hierarchical extension of the tensor-product formulation of the Hermite BS quasi-interpolation scheme. The convergence properties of this hierarchical operator, suitably defined in terms of truncated hierarchical B-spline bases, are analyzed. A selection of numerical examples is presented to compare the performances of the hierarchical and tensor-product versions of the scheme.

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Acknowledgments

This work was supported by the programs “Finanziamento Giovani Ricercatori 2014” and “Progetti di Ricerca 2015” (Gruppo Nazionale per il Calcolo Scientifico of the Istituto Nazionale di Alta Matematica Francesco Severi, GNCS - INdAM) and by the project DREAMS (MIUR Futuro in Ricerca RBFR13FBI3).

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Authors and Affiliations

  1. Dipartimento di Matematica e Informatica “U. Dini”, Università di Firenze, Viale Morgagni 67/A, 50134, Firenze, Italy

    Cesare Bracco, Carlotta Giannelli & Alessandra Sestini

  2. Dipartimento di Matematica, Università di Bari, Via Orabona 4, 70125, Bari, Italy

    Francesca Mazzia

Authors
  1. Cesare Bracco
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  2. Carlotta Giannelli
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  3. Francesca Mazzia
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  4. Alessandra Sestini
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Correspondence to Alessandra Sestini.

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Communicated by Tom Lyche.

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Bracco, C., Giannelli, C., Mazzia, F. et al. Bivariate hierarchical Hermite spline quasi-interpolation. Bit Numer Math 56, 1165–1188 (2016). https://doi.org/10.1007/s10543-016-0603-3

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  • DOI: https://doi.org/10.1007/s10543-016-0603-3

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