Discreteness of interior transmission eigenvalues revisited

This paper is devoted to the discreteness of the transmission eigenvalue problems. It is known that this problem is not self-adjoint and a priori estimates are non-standard and do not hold in general. Two approaches are used. The first one is based on the multiplier technique and the second one is based on the Fourier analysis. The key point of the analysis is to establish the compactness and the uniqueness for Cauchy problems under various conditions. Using these approaches, we are able to rediscover quite a few known discreteness results in the literature and obtain various new results for which only the information near the boundary are required and there might be no contrast of the coefficients on the boundary.


Published in:
Calculus of Variations and Partial Differential Equations, 56, Art. 51 38pp
Year:
2017
Publisher:
Heidelberg, Springer Verlag
ISSN:
1432-0835
Laboratories:




 Record created 2017-05-02, last modified 2018-03-17

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