Self-similar solutions for the generalized fractional Korteweg–de Vries equation

Abstract

We consider the Cauchy problem for the generalized fractional Korteweg–de Vries equation $u_t+D^{\alpha }{u}_x+u^p{u}_x=0,1<\alpha \le 2,p\in N^{\ast }$ with homogeneous initial data $\Phi$. We show that, under smallness assumption on $\Phi$, and for a wide range of $(\alpha ,p)$, including $p=3$, we can construct a self-similar solution of this problem.