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Paper detail

Nonexistence of soliton-like solutions for defocusing generalized KdV equations

In this short note, we consider the global dynamics of the defocusing generalized KdV equations: u_t + u_{xxx} = (|u|^{p-1}u)_x. We use Tao's theorem that the energy moves faster than mass to prove a moment type dispersion estimate. As an application of the dispersion estimate, we show that there is no soliton-like solutions with decaying assumption.

preprint2012arXivOpen access
Soonsik KwonShuanglin Shao
math.AP
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Soonsik KwonShuanglin Shao

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