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Local Well-Posedness of the Inviscid Shallow Water Equations with Surface Tension

Xin Liu, Bingheng Yang

math.AParXiv:2608.21704

Abstract

We show that the inviscid shallow water equations with gravity and surface tension are locally well-posed in dimensions one and two. In contrast to previous works by Benzoni-Gavage, Danchin, and Descombes, we work only in the real-valued phase space and make use of the symmetry of the system. Our alternative proof for local well-posedness sheds some light on the symmetric structure of the shallow water system and can be used for further study, including designing numerical scheme, dispersion estimate, etc.

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