2 papers
math.DS2010
Knudsen's law and random billiards in irrational triangles
Joan-Andreu Lazaro-Cami, Kamaludin Dingle, Jeroen Lamb
We prove Knudsen's law for a gas of particles bouncing freely in a two dimensional pipeline with serrated walls consisting of irrational triangles. Dynamics are randomly perturbed…
math.DG2005
On second Noether's theorem and gauge symmetries in Mechanics
Jose F Carinena, Joan-Andreu Lazaro-Cami, Eduardo Martinez
We review the geometric formulation of the second Noether's theorem in time-dependent mechanics. The commutation relations between the dynamics on the final constraint manifold and…