Approximate Chaotic Solutions of the Lü System.

This paper applies the multistage homotopy-perturbation method (MHPM) to the Lii system, which bridges the gap between the Lorenz system and the Chen system. Approximate closed-form expressions of the chaotic attractor are derived. Numerical comparison between the MPHM and the fourth-order Runge-Kutta method is carried out, revealing that the method is a powerful tool for analyzing and understanding chaos. [ABSTRACT FROM AUTHOR]