Top-level heading

Least action principles allowing dissipation effects

Categoria
Seminari di Analisi Matematica
Data e ora inizio evento
Data e ora fine evento
Aula
Sala di Consiglio
Sede

Dipartimento di Matematica Guido Castelnuovo, Sapienza Università di Roma

Speaker

Yann Brenier (Università di Nizza)

Usually, least action principles lead to hamiltonian, conservative and time reversible solutions in which no dissipation effect can be input. We show, through some examples related to ODEs or PDEs in astrophysics, how sticky collisions and mass concentrations, for example, can be handled by a suitable modification of the action functional on a very small set of the functional space.