B?¤cklund transformation and soliton solutions in terms of the Wronskian for the Kadomtseva??Petviashvili-based system in fluid dynamics

摘要

In this paper, investigation is made on a Kadomtseva??Petviashvili-based system, which can be seen in fluid dynamics, biology and plasma physics. Based on the Hirota method, bilinear form and B?¤cklund transformation(BT) are derived. $N$-soliton solutions in terms of the Wronskian are constructed, and it can be verified that the $N$ soliton solutions in terms of the Wronskian satisfy the bilinear form and B?¤cklund transformation. Through the $N$-soliton solutions in terms of the Wronskian, we graphically obtain the kink-dark-like solitons and parallel solitons, which keep their shapes and velocities unchanged during the propagation.