%0 Journal Article
%T Time-dependent Lagrangians invariant by a vector field
%A M. C. Mu£żoz-Lecanda
%A N. Rom¨˘n-Roy
%A F. J. Y¨˘niz-Fern¨˘ndez
%J Physics
%D 2001
%I arXiv
%R 10.1023/A:1017963123948
%X We study the reduction of non-autonomous regular Lagrangian systems by symmetries, which are generated by vector fields associated with connections in the configuration bundle of the system $Q\times\real\to\real$. These kind of symmetries generalize the idea of ``time-invariance'' (which corresponds to taking the trivial connection in the above trivial bundle).
%U http://arxiv.org/abs/math-ph/0102010v2