Multiple solutions of the nonlinear reaction-di usion model with fractional reaction

The purpose of this letter is to revisit the nonlinear reaction-di usion model in porous catalysts when reaction term is fractional function of the concen- tration distribution of the reactant. This model, which originates also in uid and solute transport in soft tissues and microvessels, has been recently given analytical solution in terms of Taylors series for di erent family of reaction terms. We apply the method so-called predictor homotopy analysis method (PHAM) which has been recently proposed to predict multiplicity of solutions of nonlinear BVPs. Consequently, it is indicated that the problem for some values of the parameter admits multiple solutions. Also, error analysis of these solutions are given graphically.