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The 2+1 dimensional Kaup-Kupershmidt (KK) equation is considered. A bilinear form for the equation is found and then 3-soliton solutions are obtained with the assistance of Mathematica. Six symmetries of the bilinear 2+1 dimensional KK equation are given and their symmetry algebra is identified.
This Letter considers two Jimbo-Miwa equations and the Fordy-Gibbons-Jimbo-Miwa equation in their bilinear form. Three-soliton solutions to these equations are explicitly derived by the Hirota method with the assistance of Mathematica.
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