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Improved parametrix in the glancing region for the interior Dirichlet-to-Neumann map
Analysis of PDEs · Submitted 6 Feb 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim As a consequence, we improve the transmission eigenvalue-free regions obtained in [12] in the isotropic case when the restrictions of the refraction indices on the boundary coincide.
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The abstract, sentence by sentence
We study the semi-classical microlocal structure of the Dirichlet-to-Neumann map for an arbitrary compact Riemannian manifold with a non-empty smooth boundary. We build a new, improved parametrix in the glancing region compaired with that one built in [9], [12]. We also study the way in which the parametrix depends on the refraction index. As a consequence, we improve the transmission eigenvalue-free regions obtained in [12] in the isotropic case when the restrictions of the refraction indices on the boundary coincide.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study the semi-classical microlocal structure of the Dirichlet-to-Neumann map for an arbitrary compact Riemannian manifold with a non-empty smooth boundary. | background 0.53 | 0.78 | 0.05 | asserted 0.96 |
| s1 | We build a new, improved parametrix in the glancing region compaired with that one built in [9], [12]. | contribution 0.98 | 0.95 | 0.25 | asserted 1.00 |
| s2 | We also study the way in which the parametrix depends on the refraction index. | contribution 1.00 | 0.92 | 0.06 | asserted 0.99 |
| s3 | As a consequence, we improve the transmission eigenvalue-free regions obtained in [12] in the isotropic case when the restrictions of the refraction indices on the boundary coincide. | result 0.93 | 0.91 | 0.57 | asserted 1.00 |
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The paper
Original abstract
We study the semi-classical microlocal structure of the Dirichlet-to-Neumann map for an arbitrary compact Riemannian manifold with a non-empty smooth boundary. We build a new, improved parametrix in the glancing region compaired with that one built in [9], [12]. We also study the way in which the parametrix depends on the refraction index. As a consequence, we improve the transmission eigenvalue-free regions obtained in [12] in the isotropic case when the restrictions of the refraction indices on the boundary coincide.
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