We consider a derivative nonlinear Schr\"odinger equation with a general
nonlinearity. This equation has a two parameter family of solitary wave
solutions. We prove orbital stability/instability results that depend on the
strength of the nonlinearity and, in some instances, their velocity. We
illustrate these results with numerical simulations.
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Title
Stability of Solitary Waves for a Generalized Derivative Nonlinear Schr\"odinger Equation