98-327 Abderemane MORAME
Absence of singular spectrum for a perturbation of a two-dimensional Laplace-Beltrami operator with periodic electro-magnetic potential (40K, LATeX 2e) May 5, 98
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Abstract. We consider a metric g, a real one-form A and a real function V, all periodic for some lattice in dimension two of the real space. We prove that the covariant Laplace-Beltrami operator, associated to g and A and perturbed by V, has continuous spectrum

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