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SOLUTIONS TO PSEUDODIFFERENTIAL EQUATIONS USING SPHERICAL RADIAL BASIS FUNCTIONS

Published online by Cambridge University Press:  17 April 2009

T. D. PHAM
Affiliation:
School of Mathematics and Statistics, The University of New South Wales, Sydney 2052, Australia (email: [email protected])
T. TRAN*
Affiliation:
School of Mathematics and Statistics, The University of New South Wales, Sydney 2052, Australia (email: [email protected])
*
For correspondence; e-mail: [email protected]
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Abstract

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Spherical radial basis functions are used to define approximate solutions to pseudodifferential equations of negative order on the unit sphere. These equations arise from geodesy. The approximate solutions are found by the collocation method. A salient feature of our approach in this paper is a simple error analysis for the collocation method using the same argument as that for the Galerkin method.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2009

References

[1] Brenner, S. C. and Scott, L. R., The Mathematical Theory of Finite Element Methods (Springer, Berlin, 2002).CrossRefGoogle Scholar
[2] Chen, D., Menegatto, V. A. and Sun, X., ‘A necessary and sufficient condition for strictly positive definite functions on spheres’, Proc. Amer. Math. Soc. 131 (2003), 27332740.CrossRefGoogle Scholar
[3] Freeden, W., Gervens, T. and Schreiner, M., Constructive Approximation on the Sphere with Applications to Geomathematics (Oxford University Press, Oxford, 1998).CrossRefGoogle Scholar
[4] Morton, T. M., ‘Improved error bounds for solving pseudodifferential equations on spheres by collocation with zonal kernels’, in: Trends in Approximation Theory (Nashville, TN, 2000), Innovations in Applied Mathematics (Vanderbilt University Press, Nashville, TN, 2001),pp. 317326.Google Scholar
[5] Morton, T. M. and Neamtu, M., ‘Error bounds for solving pseudodifferential equations on spheres’, J. Approx. Theory 114 (2002), 242268.CrossRefGoogle Scholar
[6] Müller, C., Spherical Harmonics, Lecture Notes in Mathematics, 17 (Springer, Berlin, 1966).CrossRefGoogle Scholar
[7] Nédélec, J.-C., Acoustic and Electromagnetic Equations (Springer, New York, 2000).Google Scholar
[8] Pham, T. D., Tran, T. and Le Gia, Q. T., ‘Numerical solutions to a boundary-integral equation with spherical radial basis functions’, Proceedings of the 14th Biennial Computational Techniques and Applications Conference, CTAC-2008 (eds. G. N. Mercer and A. J. Roberts) ANZIAM J. 50 (2008), C266–C281.CrossRefGoogle Scholar
[9] Schoenberg, I. J., ‘Positive definite function on spheres’, Duke Math. J. 9 (1942), 96108.CrossRefGoogle Scholar
[10] Svensson, S., ‘Pseudodifferential operators – a new approach to the boundary problems of physical geodesy’, Manuscr. Geod. 8 (1983), 140.Google Scholar
[11] Tran, T., Le Gia, Q. T., Sloan, I. H. and Stephan, E. P., ‘Boundary integral equations on the sphere with radial basis functions: error analysis’, Appl. Numer. Math. in print, available online: http://dx.doi.org/10.1016/j.apnum.2008.12.033.CrossRefGoogle Scholar
[12] Wendland, H., ‘Meshless Galerkin methods using radial basis functions’, Math. Comp. 68 (1999), 15211531.CrossRefGoogle Scholar
[13] Wendland, H., Scattered Data Approximation (Cambridge University Press, Cambridge, 2005).Google Scholar
[14] Xu, Y. and Cheney, E. W., ‘Strictly positive definite functions on spheres’, Proc. Amer. Math. Soc. 116 (1992), 977981.CrossRefGoogle Scholar