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On the Inner Radius of a Nodal Domain

Published online by Cambridge University Press:  20 November 2018

Dan Mangoubi*
Affiliation:
Department of Mathematics, The Technion, Haifa 32000, Israel e-mail: mangoubi@techunix.technion.ac.il
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Abstract

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Let $M$ be a closed Riemannian manifold. We consider the inner radius of a nodal domain for a large eigenvalue $\text{ }\!\!\lambda\!\!\text{ }.$ We give upper and lower bounds on the inner radius of the type $C/{{\lambda }^{\alpha }}{{(\log \lambda )}^{\beta }}.$ Our proof is based on a local behavior of eigenfunctions discovered by Donnelly and Fefferman and a Poincaré type inequality proved by Maz’ya. Sharp lower bounds are known only in dimension two. We give an account of this case too.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2008

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