On the application of homotopy--perturbation and Adomian decomposition   methods to the linear and nonlinear Schr\"{o}dinger equations
  I discuss a recent application of homotopy perturbation and Adomian decomposition methods to the linear and nonlinear Schr\"odinger equations. I propose a generalization of the procedure for the treatment of a wider class of problems. 
Francisco M. Fern\'andez