On the convergence of Adomian decomposition method

Here, a simple method to determine the rate of convergence of Adomian decomposition method is introduced. The proposed method is used to compare between the rate of convergence of standard and modified (proposed by Wazwaz [A.M. Wazwaz, A new method for solving singular initial value problems in the second-order ordinary differential equations, Appl. Math. Comput. 128 (2002) 45–57]) Adomian methods for solving Lane–Emden singular problem. Furthermore, with providing some examples, the aforementioned cases are dealt with numerically.