Find out the error please
I have expanded the equation(9) from the paper http://arxiv.org/abs/0802.3525 . $$-[1+\epsilon \omega_1+ \epsilon^2 \omega_2+\epsilon^3 \omega_4...][\epsilon \ddot\phi_1+\epsilon^2 \ddot\phi_2+\epsilon^3 \ddot\phi_3...]+\epsilon^2[\epsilon \Delta\phi_1 + \epsilon^2...
Inthis article, the authors present the inhomogeneous equation
$$\ddot{\phi}_2 + \phi_2 + g_2\phi_1^2 + \omega_1\ddot{\phi}_1 = 0,\tag{11}$$
where
$$ \phi_1 = p_1 \cos(\tau + \alpha), \tag{13}$$
The original solution of the inhomogeneous equation is:
$$\phi_2 = p_2\cos(\tau +...
In this articlehttp://arxiv.org/abs/0802.3525, the authors present the inhomogeneous equation
$$\ddot{\phi}_2 + \phi_2 + g_2\phi_1^2 + \omega_1\ddot{\phi}_1 = 0\tag{11}$$
followed by its solution
$$\phi_2 = p_2\cos(\tau + \alpha) + q_2\sin(\tau + \alpha) + \frac{g_2}{6}p_1^2[\cos(2\tau...