Comments on “Interactions among different types of solitary waves in (2 + 1)-dimensional system” by Cheng-lin Bai, Cheng-jie Bai, Hong Zhao [Chaos, Solitons and Fractals 25 (2005) 481]

Starting from a quite universal formula, which is valid for some quite universal (2 + 1)-dimensional physical models, Bai et al. [Bai CL, Bai CJ, Zhao H. Chaos, Solitons & Fractals 2005;25:481] have claimed that the interactions among different types of solitary waves like peakons, dromions, and compactons are investigated both analytically and graphically. We show that all of the claims by Bai et al. are wrong since the adopted q-functions do not satisfy the differential equation. From this point of view, the interactions for peakon–antidromion, compacton–antidromion, and antipeakon–compacton say nothing of completely inelastic or not completely elastic.