A symplectic Brezis-Ekeland-Nayroles principle
  We propose a modification of the hamiltonian formalism which can be used for dissipative systems. This work continues arXiv:0810.1419 and advances by the introduction of a symplectic version of the Brezis-Ekeland-Nayroles principle [Brezis Ekeland 1976] [Nayroles 1976]. As an application we show how standard plasticity can be treated in our formalism. 
Marius Buliga, Gery de Saxce
math-ph math.MP math.SG