Variational Formulation of Linear Time-Dependent Invariants
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It is shown that linear time-dependent invariants for arbitrary multi\-dimensional quadratic systems can be obtained from the Lagrangian and Hamiltonian formulation procedures by considering a variation of coordinates and momenta that follows the classical trajectory and defines a noetherian symmetry transformation.
Plain TeX, 9 pages, preprint of Instituto de Ciencias Nucleares, UNAM Departamento de F\ii sica and Matemáticas Aplicadas, México D. F. , México No. 03 (1994)
Plain TeX, 9 pages, preprint of Instituto de Ciencias Nucleares, UNAM Departamento de F\ii sica and Matemáticas Aplicadas, México D. F. , México No. 03 (1994)