 98327 Abderemane MORAME
 Absence of singular spectrum for a perturbation
of a twodimensional LaplaceBeltrami operator
with periodic electromagnetic potential
(40K, LATeX 2e)
May 5, 98

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Abstract. We consider a metric g, a real oneform A
and a real function V, all periodic for
some lattice in dimension two of the real space.
We prove that the covariant LaplaceBeltrami
operator, associated to g and A and perturbed by V,
has continuous spectrum
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