Figure 1. Bistability in a one-dimensional rate model.
The rate model described by Equations (1)–(3) has two stable fixed points for some values of the parameters 
and 
. A, B, and C: Location of the fixed points as a function of 
, for 
(A) and 
(C), and as a function of 
, with 
(B). Solid curves correspond to stable fixed points, and the dotted curves to unstable fixed points. D: Regions of monostability (white) and bistability (gray) in the parameter space 
. Blue lines show the sections of the parameter space represented in the bifurcation diagrams A–C.