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• W2904804828 abstract "In this paper, we study the approximation of $d$-dimensional $rho$-weighted integrals over unbounded domains $mathbb{R}_+^d$ or $mathbb{R}^d$ using a special change of variables, so that quasi-Monte Carlo (QMC) or sparse grid rules can be applied to the transformed integrands over the unit cube. We consider a class of integrands with bounded $L_p$ norm of mixed partial derivatives of first order, where $pin[1,+infty].$ The main results give sufficient conditions on the change of variables $nu$ which guarantee that the transformed integrand belongs to the standard Sobolev space of functions over the unit cube with mixed smoothness of order one. These conditions depend on $rho$ and $p$. The proposed change of variables is in general different than the standard change based on the inverse of the cumulative distribution function. We stress that the standard change of variables leads to integrands over a cube; however, those integrands have singularities which make the application of QMC and sparse grids ineffective. Our conclusions are supported by numerical experiments." @default.
• W2904804828 created "2018-12-22" @default.
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• W2904804828 date "2018-12-11" @default.
• W2904804828 modified "2023-09-25" @default.
• W2904804828 title "On efficient weighted integration via a change of variables" @default.
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• W2904804828 doi "https://doi.org/10.48550/arxiv.1812.04259" @default.
• W2904804828 hasPublicationYear "2018" @default.
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