Persistence of embedded eigenvalues

Details Persistence of embedded eigenvalues Persistence of embedded eigenvalues

2010-08-12

arxiv.org/abs/1008.2099v2

Mathematics

Functional Analysis

Scientific paper

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 < \infty 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 co-dimension m.

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