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Hamiltonien périodique de surface: Désintégration de Floquet. (Periodic Hamiltonians on surfaces: Floquet desintegration). (French) Zbl 0706.58009

Sémin. Théor. Spectrale Géom. 7, Année 1988-1989, 9-24 (1989).
[For the entire collection see Zbl 0699.00033.]
The author gives a detailed exposition of the Floquet’s technique for the study of a periodic Hamiltonian defined on a surface, i.e. an operator of type \(\Delta +Q,\) where \(\Delta\) is the Laplacian and Q is a periodic potential. The author refined also, as particular cases, some results from Fredholm’s operator theory.
Reviewer: M.Puta

MSC:

58C40 Spectral theory; eigenvalue problems on manifolds
47A53 (Semi-) Fredholm operators; index theories

Citations:

Zbl 0699.00033