Bifurcations and Monodromy of the Axially Symmetric 1:1:-2 Resonance

Konstantinos Efstathiou, Heinz Hanßmann, Antonella Marchesiello

We consider integrable Hamiltonian systems in three degrees of freedom near an elliptic equilibrium in 1:1:-2 resonance. The integrability originates from averaging along the perio…