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- W2012197334 abstract "Kernel-based approximation methods—often in the form of radial basis functions—have been used for many years now and usually involve setting up a kernel matrix which may be ill-conditioned when the shape parameter of the kernel takes on extreme values, i.e., makes the kernel “flat”. In this paper we present an algorithm we refer to as the Hilbert-Schmidt SVD and use it to emphasize two important points which—while not entirely new—present a paradigm shift under way in the practical application of kernel-based approximation methods: (i) it is not necessary to form the kernel matrix (in fact, it might even be a bad idea to do so), and (ii) it is not necessary to know the kernel in closed form. While the Hilbert-Schmidt SVD and its two implications apply to general positive definite kernels, we introduce in this paper a class of so-called iterated Brownian bridge kernels which allow us to keep the discussion as simple and accessible as possible." @default.
- W2012197334 created "2016-06-24" @default.
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- W2012197334 date "2014-05-30" @default.
- W2012197334 modified "2023-10-14" @default.
- W2012197334 title "An introduction to the Hilbert-Schmidt SVD using iterated Brownian bridge kernels" @default.
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- W2012197334 doi "https://doi.org/10.1007/s11075-014-9850-z" @default.
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