摘要
A modified direct method is developed to find finite symmetry groups of nonlinear mathematical physicssystems.Applying the modified direct method to the well-known (2+1)-dimensional BKP equation we get its symmetry.Furthermore,the exact solutions of (2+1)-dimensional BKP equation are obtained through symmetry analysis.
基金
National Natural Science Foundation of China under Grant Nos.90203001,90503006,0475055,and 10647112
the Foundation of Donghua University
