Discretisation Schemes for Level Sets of Planar Gaussian Fields
Discretisation Schemes for Level Sets of Planar Gaussian Fields
复制标题
平面高斯场水平集的离散化方案
DOI:
10.1007/s00220-018-3084-1
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发表时间:
2018
影响因子:
2.4
通讯作者:
Beliaev D
中科院分区:
文献类型:
--
作者:
Beliaev D
Smooth random Gaussian functions play an important role in mathematical physics, a main example being the random plane wave model conjectured by Berry to give a universal description of high-energy eigenfunctions of the Laplacian on generic compact manifolds. Our work is motivated by questions about the geometry of such random functions, in particular relating to the structure of their nodal and level sets. We study four discretisation schemes that extract information about level sets of planar Gaussian fields. Each scheme recovers information up to a different level of precision, and each requires a maximum mesh-size in order to be valid with high probability. The first two schemes are generalisations and enhancements of similar schemes that have appeared in the literature (Beffara and Gayet in Publ Math IHES, 2017. https://doi.org/10.1007/s10240-017-0093-0 ; Mischaikow and Wanner in Ann Appl Probab 17:980–1018, 2007); these give complete topological information about the level sets on either a local or global scale. As an application, we improve the results in Beffara and Gayet (2017) on Russo–Seymour–Welsh estimates for the nodal set of positively-correlated planar Gaussian fields. The third and fourth schemes are, to the best of our knowledge, completely new. The third scheme is specific to the nodal set of the random plane wave, and provides global topological information about the nodal set up to ‘visible ambiguities’. The fourth scheme gives a way to approximate the mean number of excursion domains of planar Gaussian fields.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
K. Mischaikow;Thomas Wanner
通讯作者:
Thomas Wanner
DOI:
10.15407/mag12.03.205
发表时间:
2015
期刊:
arXiv: Probability
影响因子:
--
作者:
F. Nazarov;M. Sodin
通讯作者:
M. Sodin
影响因子:
2.3
作者:
K. S. Alexander
通讯作者:
K. S. Alexander
DOI:
10.1088/1751-8113/46/45/455003
发表时间:
2013
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
D. Beliaev;Ž. Kereta
通讯作者:
Ž. Kereta
DOI:
10.1007/s10240-017-0093-0
发表时间:
2016
期刊:
Publications mathématiques de l'IHÉS
影响因子:
--
作者:
V. Beffara;D. Gayet
通讯作者:
D. Gayet