  It is shown that there exist a finite number of indicator functions, which
allow us to track an arbitrary given trajectory of the Schl\"ogl model, by
means of an explicit saturated feedback control input whose magnitude is
bounded by a constant independent of the given targeted trajectory. Simulations
are presented showing the stabilizing performance of the explicit feedback
constrained control. Further, such performance is compared to that of a
receding horizon constrained control minimizing the classical energy cost
functional.
