The hamiltonian formalism in higher order variational problems
The Lagrangian and Hamiltonian formulations for the waves in a compressible fluid with the Hall current.
In questo lavoro si ricavano: 1) l'equazione d'onda linearizzata, 2) la formulazione Lagrangiana, 3) la formulazione Hamiltoniana, nella teoria della propagazione ondosa in un fluido comprimibile descritto dalle equazioni della magnetofluidodinamica ideale in presenza di corrente Hall.
The obstacle problem and direct products of unfurled swallowtails
The quantum stability problem for time-periodic perturbations of the harmonic oscillator
The reduction of symplectic structure and Sternberg construction
Trajectoires bornées d'une particule soumise à un champ magnétique symétrique linéaire
Transience and non-explosion of certain stochastic Newtonian systems.