New interaction solutions of the (2+1)-dimensional Nizhnik–Novikov–Veselov-type system and fusion phenomena

Abstract

By means of the multilinear variable separation(MLVS) approach, new interaction solutions with low-dimensional arbitrary functions of the (2+1)-dimensional NNV-type system are constructed. Four-dromion structure, ring-parabolic soliton structure and corresponding fusion phenomena for the physical quantity U=ln f_{xy} are revealed for the first time. This MLVS approach can also be used to deal with the (2+1)-dimensional Sasa-Satsuma system.