Local Asymmetry and the Inner Radius of Nodal Domains
Local Asymmetry and the Inner Radius of Nodal Domains
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DOI:
10.1080/03605300802038577
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发表时间:
2007-03
影响因子:
1.9
通讯作者:
D. Mangoubi
中科院分区:
文献类型:
--
作者:
D. Mangoubi
Let M be a closed Riemannian manifold of dimension n. Let ϕλ be an eigenfunction of the Laplace–Beltrami operator corresponding to an eigenvalue λ. We show that the volume of {ϕλ > 0} ∩ B is ≥C|B|/λ n , where B is any ball centered at a point of the nodal set. We apply this result to prove that each nodal domain contains a ball of radius ≥C/λ n . The results in this paper extend previous results of Nazarov, Polterovich, Sodin and of the author.