Persistence of embedded eigenvalues
Persistence of embedded eigenvalues
复制标题
嵌入特征值的持久性
DOI:
10.1016/j.jfa.2010.09.005
复制
发表时间:
2010
影响因子:
1.7
通讯作者:
Sara Maad Sasane
中科院分区:
文献类型:
--
作者:
S. Agmon;I. Herbst;Sara Maad Sasane
We consider conditions under which an embedded eigenvalue of a self-adjoint operator remains embedded under small perturbations. In the case of a simple eigenvalue embedded in continuous spectrum of multiplicity m<∞ we show that in favorable situations, the set of small perturbations of a suitable Banach space which do not remove the eigenvalue form a smooth submanifold of codimension m. We also have results regarding the cases when the eigenvalue is degenerate or when the multiplicity of the continuous spectrum is infinite.