$L^2$ orbital stability of Dirac solitons in the massive Thirring model

We prove $L^2$ orbital stability of Dirac solitons in the massive Thirring model. Our analysis uses local well posedness of the massive Thirring model in $L^2$, conservation of the charge functional, and the auto--Bäcklund transformation. The latter transformation exists because the massive Thirring model is integrable via the inverse scattering transform method.

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