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Displaying similar documents to “A spectral study of an infinite axisymmetric elastic layer”

A non elliptic spectral problem related to the analysis of superconducting micro-strip lines

Anne-Sophie Bonnet-Bendhia, Karim Ramdani (2002)

ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique

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This paper is devoted to the spectral analysis of a non elliptic operator A , deriving from the study of superconducting micro-strip lines. Once a sufficient condition for the self-adjointness of operator A has been derived, we determine its continuous spectrum. Then, we show that A is unbounded from below and that it has a sequence of negative eigenvalues tending to - ∞ . Using the Min-Max principle, a characterization of its positive eigenvalues is given. Thanks to this characterization,...

Asymmetric heteroclinic double layers

Michelle Schatzman (2002)

ESAIM: Control, Optimisation and Calculus of Variations

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Let W be a non-negative function of class C 3 from ℝ 2 to ℝ , which vanishes exactly at two points 𝐚 and 𝐛 . Let S 1 ( 𝐚 , 𝐛 ) be the set of functions of a real variable which tend to 𝐚 at - ∞ and to 𝐛 at + ∞ and whose one dimensional energy E 1 ( v ) = ∫ ℝ W ( v ) + | v ' | 2 / 2 d x is finite. Assume that there exist two isolated minimizers z + and z - of the energy E 1 over S 1 ( 𝐚 , 𝐛 ) . Under a mild coercivity condition on the potential W and a generic spectral condition on the linearization of the one-dimensional Euler–Lagrange operator...