On the behavior of 1-Laplacian ratio cuts on nearly rectangular domains
On the behavior of 1-Laplacian ratio cuts on nearly rectangular domains
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关于近矩形域上 1-拉普拉斯比率切割的行为
DOI:
10.1093/imaiai/iaaa034
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Wu, Hau-tieng
中科院分区:
文献类型:
--
作者:
Hamilton, Wesley;Marzuola, Jeremy L.;Wu, Hau-tieng
The-Laplacian has attracted more and more attention in data analysis disciplines in the past decade. However, there is still a knowledge gap about its behavior, which limits its practical application. In this paper, we are interested in its iterative behavior in domains contained in two-dimensional Euclidean space. Given a connected set, define a sequence of setswhereis the subset ofwhere the first eigenfunction of the (properly normalized) Neumann-Laplacianis positive (or negative). For, this is also referred to as the ratio cut of the domain. We conjecture that these sets converge to the set of rectangles with eccentricity bounded by 2 in the Gromov–Hausdorff distance as long as they have a certain distance to the boundary. We establish some aspects of this conjecture forwhere we prove that (1) the 1-Laplacian spectral cut of domains sufficiently close to rectangles is a circular arc that is closer to flat than the original domain (leading eventually to quadrilaterals) and (2) quadrilaterals close to a rectangle of aspect ratiostay close to quadrilaterals and move closer to rectangles in a suitable metric. We also discuss some numerical aspects and pose many open questions.
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