Nonexistence of soliton-like solutions for defocusing generalized KdV equations

Autor: Soonsik Kwon, Shuanglin Shao
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: Electronic Journal of Differential Equations, Vol 2015, Iss 51,, Pp 1-5 (2015)
Druh dokumentu: article
ISSN: 1072-6691
Popis: We consider the global dynamics of the defocusing generalized KdV equation $$ \partial_t u + \partial_x^3 u = \partial_x(|u|^{p-1}u). $$ We use Tao's theorem [5] that the energy moves faster than the 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 a certain decaying assumption.
Databáze: Directory of Open Access Journals