Papers › Minimax separation of the Cauchy kernel
Minimax separation of the Cauchy kernel
Jonathan E. Moussa
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We prove and apply an optimal low-rank approximation of the Cauchy kernel over separated real domains. A skeleton decomposition is the minimum over real-valued functions of the maximum relative pointwise error. We present an algorithm to optimize its parameters, demonstrate suboptimal but effective heuristic approximations, and identify numerically stable forms.
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