Abstract
We study the reduction of nonautonomous regular Lagrangian systems by symmetries, which are generated by vector fields associated with connections in the configuration bundle of the system Q × \(\mathbb{R}\) → \(\mathbb{R}\). These kind of symmetries generalize the idea of ‘time-invariance’ (which corresponds to taking the trivial connection in the above trivial bundle).
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Muñoz-Lecanda, M.C., Román-Roy, N. & Yániz-Fernández, F.J. Time-Dependent Lagrangians Invariant by a Vector Field. Letters in Mathematical Physics 57, 107–121 (2001). https://doi.org/10.1023/A:1017963123948
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DOI: https://doi.org/10.1023/A:1017963123948