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Automatic optimal-rate convergence of randomized nets using median-of-means

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abstract

We study the sample median of independently generated quasi-Monte Carlo estimators based on randomized digital nets and prove it approximates the target integral value at almost the optimal convergence rate for various function spaces. In contrast to previous methods, the algorithm does not require a priori knowledge of underlying function spaces or even an input of pre-designed $(t,m,s)$-digital nets, and is therefore easier to implement. This study provides further evidence that quasi-Monte Carlo estimators are heavy-tailed when applied to smooth integrands and taking the median can significantly improve the error by filtering out the outliers.

fields

math.NA 1

years

2024 1

verdicts

ACCEPT 1

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Error estimation for quasi-Monte Carlo

math.NA · 2024-12-30 · accept · novelty 2.0

A review of uncertainty quantification for quasi-Monte Carlo that recommends Student's t intervals from at least 10 randomized replicates and identifies near-symmetry of RQMC errors as a promising but unproven basis for confidence intervals.

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  • Error estimation for quasi-Monte Carlo math.NA · 2024-12-30 · accept · none · ref 83 · internal anchor

    A review of uncertainty quantification for quasi-Monte Carlo that recommends Student's t intervals from at least 10 randomized replicates and identifies near-symmetry of RQMC errors as a promising but unproven basis for confidence intervals.