The relevant equations are the following:

,

,

,

where is the rate constant of reaction → and is a constant equal to the total concentration of all species for .

The Demonstration displays parametric plots (i.e., versus for different initial conditions) referred to as reaction paths. The system's steady state is shown with a blue dot; all reaction paths converge to this point. Users can set the different values of the rate constants, keeping in mind that they must obey the microscopic reversibility rule: .