Spectral geometry of harmonic maps into warped product manifolds. II.
Spectral theory of translation surfaces : A short introduction
We define translation surfaces and, on these, the Laplace operator that is associated with the Euclidean (singular) metric. This Laplace operator is not essentially self-adjoint and we recall how self-adjoint extensions are chosen. There are essentially two geometrical self-adjoint extensions and we show that they actually share the same spectrum
Sur l'homologie et le spectre des variétés hyperboliques