A Tree Algorithm for Isotropic Finite Elements on the Sphere
- The Earth's surface is an almost perfect sphere. Deviations from its spherical shape are less than 0,4% of its radius and essentially arise from its rotation. All equipotential surfaces are nearly spherical, too. In consequence, multiscale modelling of geoscientifically relevant data on the sphere involving rotational symmetry of the trial functions used for the approximation plays an important role. In this paper we deal with isotropic kernel functions showing local support and (one-dimensional) polynomial structure (briefly called isotropic finite elements) for reconstructing square--integrable functions on the sphere. Essential tool is the concept of multiresolution analysis by virtue of the spherical up function. The main result is a tree algorithm in terms of (low--order) isotropic finite elements.
Verfasser*innenangaben: | Frank Bauer, Willi Freeden, Michael Schreiner |
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URN: | urn:nbn:de:hbz:386-kluedo-12684 |
Schriftenreihe (Bandnummer): | Schriften zur Funktionalanalysis und Geomathematik (3) |
Dokumentart: | Preprint |
Sprache der Veröffentlichung: | Englisch |
Jahr der Fertigstellung: | 2003 |
Jahr der Erstveröffentlichung: | 2003 |
Veröffentlichende Institution: | Technische Universität Kaiserslautern |
Datum der Publikation (Server): | 10.11.2003 |
Freies Schlagwort / Tag: | Locally Supported Radial Basis Functions; Multisresolution Analysis; Spherical; Up Functions |
Fachbereiche / Organisatorische Einheiten: | Kaiserslautern - Fachbereich Mathematik |
DDC-Sachgruppen: | 5 Naturwissenschaften und Mathematik / 510 Mathematik |
Lizenz (Deutsch): | Standard gemäß KLUEDO-Leitlinien vor dem 27.05.2011 |