Pollution has become an intense danger to our environment. The lake pollution model is
formulated into the three‐dimensional system of differential equations with three instances of …

The multistage homotopy‐perturbation method (MHPM) is applied to the nonlinear chaotic
and hyperchaotic Lü systems. MHPM is a technique adapted from the standard homotopy …

ABSTRACT In this study, Harmonic Balance Method (HBM) is applied to determine
approximate analytic solutions of strongly nonlinear Duffing oscillators with cubic-quintic …

In this paper, homotopy perturbation method is applied to the high-order nonlinear boundary
value problems namely fourth-order and seventhorder. The numerical results are compared …

In this paper, first a new homotopy perturbation method for solving a fractional order
nonlinear telegraph equation is introduced. By applying the proposed method, the nonlinear …