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Singular Lagrangian foliation associated to an integrable Hamiltonian vector field. (English) Zbl 0731.58038
Symplectic geometry, groupoids, and integrable systems, Sémin. Sud- Rhodan. Geom. VI, Berkeley/CA (USA) 1989, Math. Sci. Res. Inst. Publ. 20, 129-136 (1991).
[For the entire collection see Zbl 0722.00026.]
It is demonstrated that the geometry of an integrable Hamiltonian system follows rather “generic assumptions”. These hypotheses allow to study higher codimension singularities.

##### MSC:
 37J35 Completely integrable finite-dimensional Hamiltonian systems, integration methods, integrability tests 37K10 Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.) 37C85 Dynamics induced by group actions other than $$\mathbb{Z}$$ and $$\mathbb{R}$$, and $$\mathbb{C}$$