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- W2892615712 abstract "Automatic cubatures approximate multidimensional integrals to user-specified error tolerances. For high dimensional problems, it makes sense to fix the sampling density but determine the sample size, $n$, automatically. Bayesian cubature postulates that the integrand is an instance of a stochastic process. Here we assume a Gaussian process parameterized by a constant mean and a covariance function defined by a scale parameter times a parameterized function specifying how the integrand values at two different points in the domain are related. These parameters are estimated from integrand values or are given non-informative priors. The sample size, $n$, is chosen to make the half-width of the credible interval for the Bayesian posterior mean no greater than the error tolerance. The process just outlined typically requires vector-matrix operations with a computational cost of $O(n^3)$. Our innovation is to pair low discrepancy nodes with matching kernels that lower the computational cost to $O(n log n)$. This approach is demonstrated using rank-1 lattice sequences and shift-invariant kernels. Our algorithm is implemented in the Guaranteed Automatic Integration Library (GAIL)." @default.
- W2892615712 created "2018-10-05" @default.
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- W2892615712 date "2019-09-10" @default.
- W2892615712 modified "2023-10-14" @default.
- W2892615712 title "Fast automatic Bayesian cubature using lattice sampling" @default.
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- W2892615712 doi "https://doi.org/10.1007/s11222-019-09895-9" @default.
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