Conformal Spectrum and Harmonic maps (original) (raw)
2010, Eprint Arxiv 1007 3104
This paper is devoted to the study of the conformal spectrum (and more precisely the first eigenvalue) of the Laplace-Beltrami operator on a smooth connected compact Riemannian surface without boundary, endowed with a conformal class. We give a constructive proof of a critical metric which is smooth except at some conical singularities and maximizes the first eigenvalue in the conformal class of the background metric. We also prove that the map associating a finite number of eigenvectors of the maximizing lambda_1\lambda_1lambda_1 into the sphere is harmonic, establishing a link between conformal spectrum and harmonic maps.
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