Invariants and approximate solutions for certain non-linear oscillators by means of the field method
Applied Mathematics and Computation, 215, (9), . (doi:10.1016/j.amc.2009.10.025).
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Certain strongly non-linear conservative oscillators are approached with the field method, which is combined with the convolution integral method. A complete set of their adiabatic invariants are derived, on the basis of which approximate solutions for motion can be obtained
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