Instability of the solitary waves for the generalized derivative nonlinear Schrödinger equation in the degenerate case

Changxing Miao, Xingdong Tang, Guixiang Xu

In this paper, we develop the modulation analysis, the perturbation argument and the Virial identity similar as those in \cite{MartelM:Instab:gKdV} to show the orbital instability…