A Monte Carlo Method for Integration of Multivariate Smooth Functions
A Monte Carlo Method for Integration of Multivariate Smooth Functions
复制标题
多元平滑函数积分的蒙特卡罗方法
DOI:
--
复制
发表时间:
2016
影响因子:
2.9
通讯作者:
Mario Ullrich
中科院分区:
文献类型:
--
作者:
Mario Ullrich
We study a Monte Carlo algorithm that is based on a specific (randomly shifted and dilated) lattice point set. The main result of this paper is that the mean squared error for a given compactly supported, square-integrable function is bounded by $n^{-1/2}$ times the $L_2$-norm of the Fourier transform outside a region around the origin, where $n$ is the expected number of function evaluations. As corollaries we obtain the order of convergence for the Sobolev spaces $H^s_p$ with isotropic, anisotropic or mixed smoothness for all values of the parameters. This proves, in particular, that the optimal order of convergence in the latter case is $n^{-s-1/2}$ for $pge2$, which is, in contrast to the case of deterministic algorithms, independent of the dimension. This shows that Monte Carlo algorithms can improve the order by more than $n^{-1/2}$ for a whole class of practically important function classes. All results carry over to functions defined on the unit cube without boundary conditions.
DOI:
10.1137/15m1014814
发表时间:
2016
期刊:
SIAM J. Numer. Anal.
影响因子:
--
作者:
M. Ullrich;T. Ullrich
通讯作者:
T. Ullrich
DOI:
10.1007/978-3-319-92240-9
发表时间:
2018
期刊:
arXiv: Numerical Analysis
影响因子:
--
作者:
D. Dũng;V.N. Temlyakov;T. Ullrich
通讯作者:
T. Ullrich