Find parameter values for BK conditions!

I have 2 parameters, a and b. I know that if a is high b must be low and vice versa for the BK conditions to be satisfied. But I don’t know exactly how big b can be for a given value of a. So is there a clever way to grid over those parameters and come up with the combination area of a and b where the BK conditions are satisfied?

\Glm

You can use the sensitivity command to map parameters combinations to stable regions.