On symmetries in Galilei classical mechanics

Details On symmetries in Galilei classical mechanics On symmetries in Galilei classical mechanics

2000-03-24

arxiv.org/abs/math-ph/0003027v2

J.Math.Phys. 41 (2000) 6824

Physics

Mathematical Physics

28 pages, AMSLaTeX v. 2.0, AMSfonts and hyperref. Minor grammar and LaTeX improvements

Scientific paper

In the framework of Galilei classical mechanics (i.e., general relativistic classical mechanics on a spacetime with absolute time) developed by Jadczyk and Modugno, we analyse systematically the relations between symmetries of the geometric objects. We show that the (holonomic) infinitesimal symmetries of the cosymplectic structure on spacetime and of its potentials are also symmetries of spacelike metric, gravitational and electromagnetic fields, Euler-Lagrange morphism, Lagrangians. Then, we provide a covariant momentum map associated with a group of cosymplectic symmetries by using a covariant lift of functions of phase space. In the case of an action that projects on spacetime we see that the components of this momentum map are quantisable functions in the sense of Jadczyck and Modugno. Finally, we illustrate the results in some examples.

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