Abstract
It is shown that a linear Hamiltonian system of signature zero on R4 is elliptic, hyperbolic or mixed according to the number of Lagrangian planes in the null-cone H-1 (0), or equivalently the number of invariant Lagrangian planes. A weaker extension to higher dimensions is described. © 2007 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 344-350 |
Number of pages | 6 |
Journal | Differential Geometry and its Application |
Volume | 25 |
Issue number | 3 |
DOIs | |
Publication status | Published - Jun 2007 |
Keywords
- Hamiltonian systems
- Lagrangian planes
- Null-cone
- Symplectic geometry