NEW RESULTS ON TRANSMISSION EIGENVALUES

被引:18
作者
Cakoni, Fioralba [1 ]
Gintides, Drossos [2 ]
机构
[1] Univ Delaware, Dept Math Sci, Newark, DE 19716 USA
[2] Natl Tech Univ Athens, Dept Math, Athens 15780, Greece
关键词
Interior transmission problem; transmission eigenvalues; inhomogeneous medium; inverse scattering problem; EXISTENCE;
D O I
10.3934/ipi.2010.4.39
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We consider the interior transmission eigenvalue problem corresponding to the inverse scattering problem for an isotropic inhomogeneous medium. We first prove that transmission eigenvalues exist for media with index of refraction greater or less than one without assuming that the contrast is sufficiently large. Then we show that for an arbitrary Lipshitz domain with constant index of refraction there exists an infinite discrete set of transmission eigenvalues that accumulate at infinity. Finally, for the general case of non constant index of refraction we provide a lower and an upper bound for the first transmission eigenvalue in terms of the first transmission eigenvalue for appropriate balls with constant index of refraction.
引用
收藏
页码:39 / 48
页数:10
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