Time-Dependent Cauchy-Navier Splines and their Application to Seismic Wave Front Propagation

  • In this paper a known orthonormal system of time- and space-dependent functions, that were derived out of the Cauchy-Navier equation for elastodynamic phenomena, is used to construct reproducing kernel Hilbert spaces. After choosing one of the spaces the corresponding kernel is used to define a function system that serves as a basis for a spline space. We show that under certain conditions there exists a unique interpolating or approximating, respectively, spline in this space with respect to given samples of an unknown function. The name "spline" here refers to its property of minimising a norm among all interpolating functions. Moreover, a convergence theorem and an error estimate relative to the point grid density are derived. As numerical example we investigate the propagation of seismic waves.

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Author:Paula Kammann, Volker Michel
URN (permanent link):urn:nbn:de:hbz:386-kluedo-14373
Serie (Series number):Schriften zur Funktionalanalysis und Geomathematik (26)
Document Type:Preprint
Language of publication:English
Year of Completion:2006
Year of Publication:2006
Publishing Institute:Technische Universität Kaiserslautern
Tag:Cauchy-Navier-Gleichung; reproduzierender Kern
Cauchy-Navier equation; reproducing kernel ; seismic wave ; sphere ; spline
GND-Keyword:Approximation; Elastizität ; Seismische Welle ; Sphäre ; Spline ; Zeitabhängigkeit
Faculties / Organisational entities:Fachbereich Mathematik
DDC-Cassification:510 Mathematik
MSC-Classification (mathematics):41A05 Interpolation [See also 42A15 and 65D05]
41A15 Spline approximation
41A52 Uniqueness of best approximation
65D07 Splines
86A17 Global dynamics, earthquake problems

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