Conservation laws of the generalized short pulse equation
Zhang Zhi-Yong (张智勇)a, Chen Yu-Fu (陈玉福)b
a College of Sciences, North China University of Technology, Beijing 100144, China; b School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract We show that the generalized short pulse equation is nonlinearly self-adjoint with differential substitution. Moreover, any adjoint symmetry is a differential substitution of nonlinear self-adjointness, and vice versa. Consequently, the general conservation law formula is constructed and new conservation laws for some special cases are found.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11301012 and 11271363), the Excellent Young Teachers Program of North China University of Technology (Grant No. 14058) and the Doctoral Fund of North China University of Technology (Grant No. 41).
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