Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

IN this article the author written a nonlinear equation as $$-\frac{\partial^2 \phi}{\partial t^2}+ \nabla \phi= \phi+ \sum_{k=2}^\infty g_k \phi^k$$

They have scaled the time as, $$\tau=\omega(\varepsilon) t$$ they have said in equation (8) is $\omega=1$ because of threshold and in the equation (14) they have said that $\omega_1 =0$ because ofbounded solution and absence of bounded solution no resonance occur.

Can you explain the two conditions please that why is this?

share|improve this question

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.