Cusp solitons to the long-short waves equation and the $\bar\partial$-dressing method

The dressing method based on $3\times3$ matrix $\bar{\partial}$-problem is extended to study the long-short waves equation with the cases $σ=\pm1$. The soliton solutions for the long-short wave equation for $σ=\pm1$ are given by means of the properties of Cauchy matrix. It is shown that the long-short wave equation for $σ=1$ has the cusp solitons.

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