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We investigate the (2+1)-dimensional nonlinear BKP and GKP equations with the modified direct CK's method. Then, we get its Lie point groups and the full symmetry group, and a relationship is constructed between the new solutions and the old one. Based on the relationship, the new solutions can be obtained by using a given solution of the equations.doi:10.1155/2014/786965 fatcat:pv57tcieczhbdbxa4d4hetomyu