Some special travelling wave solutions of the $(2+1)$-dimensional Sawada–Kotera (SK) equation are constructed by a new travelling wave method related to the bilinear transformation. It is found the SK equation possesses plenty of novel travelling wave solutions, such as the few-cycle-pulse solitons (FCPs), the asymmetric soliton, the soliton molecules, the three-peak soliton, the plat soliton, the double-peak soliton, the periodic wave solutions, etc. All the obtained solutions are all related to the background.

中文翻译：

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(2+1)维Sawada-Kotera方程的新行波结构

一些特殊的行波解 $(2+1)$维Sawada–Kotera (SK) 方程是通过与双线性变换相关的新行波方法构建的。发现SK方程具有许多新的行波解，如少周期脉冲孤子(FCPs)、不对称孤子、孤子分子、三峰孤子、平板孤子、双峰孤子、周期波解等。所有得到的解都与背景有关。