%0 Journal Article %T Approximate homotopy series solutions of perturbed PDEs via approximate symmetry method %A Zhi-Yong Zhang %J Physics %D 2011 %I arXiv %X We show that the two couple equations derived by approximate symmetry method and approximate homotopy symmetry method are connected by a transformation for the perturbed PDEs. Consequently, approximate homotopy series solutions can be obtained by acting the transformation on the known solutions by approximate symmetry method. Applications to the Cahn-Hilliard equation illustrate the effectiveness of the transformation. %U http://arxiv.org/abs/1112.4225v2