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A propos de la multiplicité de la première valeur propre du laplacien d’une surface de Riemann. (On the multiplicity of the first eigenvalue of the Laplacian on a Riemann surface). (French) Zbl 0574.53029

We produce examples of Riemann surfaces whose n-first eigenvalues of the Laplacian are of large multiplicity.

MSC:

53C20 Global Riemannian geometry, including pinching
58J50 Spectral problems; spectral geometry; scattering theory on manifolds
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