The chemical reactions of the Brusselator are . The model describes a chemical system that converts reactant to a final product through four steps. For simplicity, the concentrations and of and are maintained constant, and all reaction rates are set equal to one. The system of differential equations that describe the dimensionless concentrations and of species and in the forced Brusselator are and , where is the force amplitude and is the force frequency. You can vary the parameters , , , and to see the trajectories of the variables and .