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Communications in Mathematical Physics 229, 3 (2002) 459-489
Hamiltonian monodromy via Picard-Lefschetz theory
Michèle Audin 1
(09/2002)

In this paper, we investigate the "Hamiltonian'' monodromy of the fibration in Liouville tori of certain integrable systems via (real) algebraic geometry. Using Picard-Lefschetz theory in a relative Prym variety, we determine the Hamiltonian monodromy of the "geodesic flow on $SO(4)$''. Using a relative generalized Jacobian, we prove that the Hamiltonian monodromy of the spherical pendulum can also be obtained by Picard-Lefschetz formula.
1 :  Institut de Recherche Mathématique Avancée (IRMA)
CNRS : UMR7501 – Université Louis Pasteur - Strasbourg I
Mathématiques/Géométrie algébrique
Integrable systems – monodromy – Picard-Lefschetz theory – generalized Jacobians – Prym varieties – geodesic flow – free rigid body – spherical pendulum – action-angle variables – Arnold-Liouville theorem – Lax equations – spinning tops"
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