Abstract
In this Letter we establish the integrability of two nonlinear oscillators through group theoretical method. We utilize the algorithm given in [M.L. Gandarias, M.S. Bruzon, J. Nonlinear Math. Phys. 18 (2011) 123] and construct nonlocal symmetries for these two oscillators. From the knowledge of the latter we derive first integral and general solution for these two nonlinear nonpolynomial oscillator equations.
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