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VA Baikov, RK Gazizov, NH Ibragimov (1991)
Perturbation methods in group analysis. (English translation published in J Soviet Math 55.1: 1450) Itogi Nauki TekhnikiSer Sovremennye Problemy Matematiki, 34
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Exact symmetries of the unperturbed (linear) part of the dynamical systems are determined. Resonance conditions which lead to the symmetry-breaking of the symmetries of the unperturbed part are obtained. The second-order approximate symmetries of the one degree of freedom, damped-driven oscillators are found. By employing an approximate version of Noether’s theorem, second-order approximate first integrals are obtained for undamped oscillators. The results are discussed on the contour plots of the first integrals.
ARI - An International Journal for Physical and Engineering Sciences – Springer Journals
Published: Apr 24, 2014
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