Abstract
The global Radial Basis Functions (RBFs) may lead to ill-conditioned system of linear equations. This contribution analyzes conditionality of the Gauss and the Thin Plate Spline (TPS) functions. Experiments made proved dependency between the shape parameter and number of RBF center points where the matrix is ill-conditioned. The dependency can be further described as an analytical function.
The research was supported by projects Czech Science Foundation (GACR) No. 17-05534S and partially by SGS 2019-016.
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- 1.
The Delaunay triangulation has time complexity of \(O\left( n^{\lceil d/2\rceil +1}\right) \), where d is number of tesselated dimensions.
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Acknowledgement
The authors would like to thank their colleagues and students at the University of West Bohemia for their discussions and suggestions, and especially to Michal Smolik for valuable discussion and notes he provided. The research was supported by projects Czech Science Foundation (GACR) No. 17-05534S and partially by SGS 2019-016.
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Červenka, M., Skala, V. (2020). Conditionality Analysis of the Radial Basis Function Matrix. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2020. ICCSA 2020. Lecture Notes in Computer Science(), vol 12250. Springer, Cham. https://doi.org/10.1007/978-3-030-58802-1_3
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