A note on focus-focus singularities

✍ Scribed by Nguyen Tien Zung

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 462 KB
• Volume: 7
• Category: Article
• ISSN: 0926-2245
• DOI: 10.1016/s0926-2245(96)00042-3

✦ Synopsis

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.