Geodesic
A class of topographical waveguides
Algebra i analiz, Tome 22 (2010) no. 1, pp. 98-107 
V. M. Babich. A class of topographical waveguides. Algebra i analiz, Tome 22 (2010) no. 1, pp. 98-107. http://geodesic.mathdoc.fr/item/AA_2010_22_1_a4/
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Voir la notice de l'article provenant de la source Math-Net.Ru

In the case of some infinite domains, it is shown that the spectrum of the elasticity theory operator is not purely continuous. This implies the existence of a new class of the so-called topographical waveguides.

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