On semi-global invariants for focus-focus singularities

Details On semi-global invariants for focus-focus singularities On semi-global invariants for focus-focus singularities

2002-08-30

arxiv.org/abs/math/0208245v1

Mathematics

Symplectic Geometry

19 pages 4 fig. Written in june 2001. To appear in Topology

Scientific paper

This article gives a classification, up to symplectic equivalence, of
singular Lagrangian foliations given by a completely integrable system of a
4-dimensional symplectic manifold, in a full neighbourhood of a singular leaf
of focus-focus (=nodal) type.

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