Sj. Yu et al., N SOLITON-SOLUTIONS TO THE BOGOYAVLENSKII-SCHIFF EQUATION AND A QUESTFOR THE SOLITON SOLUTION IN (3+1) DIMENSIONS, Journal of physics. A, mathematical and general, 31(14), 1998, pp. 3337-3347
We study the integrable systems in higher dimensions which can be writ
ten by the trilinear form instead of by the Hirota's bilinear form. We
explicitly discuss the Bogoyavlenskii-Schiff equation in (2 + 1) dime
nsions. Its analytical proof of multisoliton solution and a new featur
e are given. Being guided by the strong symmetry, we also propose a ne
w equation in (3 + 1) dimensions.