Transmission Eigenvalues for Elliptic Operators

@article{Hitrik2010TransmissionEF,
  title={Transmission Eigenvalues for Elliptic Operators},
  author={Michael Hitrik and Katsiaryna Krupchyk and Petri Ola and Lassi P{\"a}iv{\"a}rinta},
  journal={SIAM J. Math. Anal.},
  year={2010},
  volume={43},
  pages={2630-2639}
}
A reduction of the transmission eigenvalue problem for multiplicative sign-definite perturbations of elliptic operators with constant coefficients to an eigenvalue problem for a non-self-adjoint compact operator is given. Sufficient conditions for the existence of transmission eigenvalues and completeness of generalized eigenstates for the transmission eigenvalue problem are derived. In the trace class case, the generic existence of transmission eigenvalues is established. 

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