Deprit's reduction of the nodes revisited
Résumé
We revisit a set of symplectic variables introduced by Andre Deprit (Celest Mech , 181-195, 1983), which allows for a complete symplectic reduction in rotation invariant Hamiltonian systems, generalizing to arbitrary dimension Jacobi's reduction of the nodes. In particular, we introduce an action-angle version of Deprit's variables, connected to the Delaunay variables, and give a new hierarchical proof of the symplectic character of Deprit's variables.
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