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- W4287164411 abstract "The main focus of this article is to provide a mathematical study of the algorithm proposed in cite{boyaval2010variance} where the authors proposed a variance reduction technique for the computation of parameter-dependent expectations using a reduced basis paradigm. We study the effect of Monte-Carlo sampling on the theoretical properties of greedy algorithms. In particular, using concentration inequalities for the empirical measure in Wasserstein distance proved in cite{fournier2015rate}, we provide sufficient conditions on the number of samples used for the computation of empirical variances at each iteration of the greedy procedure to guarantee that the resulting method algorithm is a weak greedy algorithm with high probability. These theoretical results are not fully practical and we therefore propose a heuristic procedure to choose the number of Monte-Carlo samples at each iteration, inspired from this theoretical study, which provides satisfactory results on several numerical test cases." @default.
- W4287164411 created "2022-07-25" @default.
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- W4287164411 date "2021-05-28" @default.
- W4287164411 modified "2023-10-10" @default.
- W4287164411 title "Influence of sampling on the convergence rates of greedy algorithms for parameter-dependent random variables" @default.
- W4287164411 doi "https://doi.org/10.48550/arxiv.2105.14091" @default.
- W4287164411 hasPublicationYear "2021" @default.
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