These are the slides of a presentation given at a seminaire D'Alambert, in 2014, on the emerging subject of hamiltonian systems with dissipation based on a symplectic Brezis-Ekeland-Nayroles principle.
For newer treatment of the subject see: M. Buliga, On the information content of the difference from hamiltonian evolution, arXiv:1902.04598,https://arxiv.org/abs/1902.04598
For newer treatment of the subject see: M. Buliga, On the information content of the difference from hamiltonian evolution, arXiv:1902.04598,https://arxiv.org/abs/1902.04598