Localisation of the first eigenfunction of a convex domain
Localisation of the first eigenfunction of a convex domain
复制标题
凸域第一特征函数的局部化
DOI:
10.1080/03605302.2020.1843050
复制
发表时间:
2021
影响因子:
1.9
通讯作者:
Beck, Thomas
中科院分区:
文献类型:
--
作者:
Beck, Thomas
We study the first Dirichlet eigenfunction of the Laplacian in an-dimensional convex domain. For domains of a fixed inner radius, estimates of Chiti [,], imply that the ratio of theL2-norm and-norm of the eigenfunction is minimised when the domain is a ball. However, when the eccentricity of the domain is large, the eigenfunction should spread out at a certain scale and this ratio should increase. We make this precise by obtaining a lower bound on theL2-norm of the eigenfunction and show that the eigenfunction cannot localise to too small a subset of the domain. As a consequence, we settle a conjecture of van den Berg, , in the generaln-dimensional case. The main feature of the proof is to obtain sufficiently sharp estimates on the first eigenvalue in order to estimate the first derivatives of the eigenfunction.
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DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
B. Georgiev;Mayukh Mukherjee;S. Steinerberger
通讯作者:
S. Steinerberger
DOI:
10.1090/proc/13343
发表时间:
2015
期刊:
arXiv: Spectral Theory
影响因子:
--
作者:
S. Steinerberger
通讯作者:
S. Steinerberger
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
B. Georgiev;Mayukh Mukherjee
通讯作者:
Mayukh Mukherjee
影响因子:
3
作者:
M. Rachh;S. Steinerberger
通讯作者:
S. Steinerberger
影响因子:
3.1
作者:
D. Grieser;D. Jerison
通讯作者:
D. Jerison