Definition
Radial basis function networks are a means of approximation by algorithms using linear combinations of translates of a rotationally invariant function, called the radial basis function. The coefficients of these approximations usually solve a minimization problem and can also be computed by interpolation processes. Sometimes the very useful approach of quasi-interpolation is also applied where approximations are computed that do not necessarily match the target functions pointwise but satisfy certain smoothness and decay conditions. The radial basis functions constitute so-called reproducing kernels on certain Hilbert spaces or – in a slightly more general setting – semi-Hilbert spaces. In the latter case, the aforementioned approximation also contains an...
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Buhmann, M.D. (2017). Radial Basis Function Networks. In: Sammut, C., Webb, G.I. (eds) Encyclopedia of Machine Learning and Data Mining. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-7687-1_698
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