A note on focus-focus singularities

Nguyen Tien Zung

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A note on focus-focus singularities

Nguyen Tien Zung

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Abstract

We give a topological and geometrical description of focus-focus singularities of integrable Hamiltonian systems. In particular, we explain why the monodromy around these singularities is non-trivial, a result obtained before by J.J. Duistermaat and others for some concrete systems.

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Nguyen Tien Zung. 2001-10-14. A note on focus-focus singularities. https://arxiv.org/abs/math/0110147

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