Based on the Homotopy Analysis Method to Solve the Klein - Gordon Equation
This paper applies the homotopy analysis method to solve Klein-Gordon equation, Firstly, structure a zero-order deformation equation. Then get the formal approximation of the model from high-order deformation equation and prove the effectiveness of the solution in the end.
Yun-Hae Kim and Prasad Yarlagadda
H. Y. Li et al., "Based on the Homotopy Analysis Method to Solve the Klein - Gordon Equation", Applied Mechanics and Materials, Vols. 278-280, pp. 62-67, 2013