Fig. 6

When the supply point (blue dot) for the resources lies outside the wedge as defined by the consumption vectors, there cannot be coexistence of both consumers. In both cases the system first develops to the trivial point. In a, b next the system moves towards the point with only B. Both are saddles and eventually the stable point with only A is reached. Note that between the two saddles the trajectory in (b) is parallel to the consumption vector of B. When the supply point is above the wedge (d), the roles of the two consumers are interchanged. After heading for the trivial state the trajectory moves parallel to the consumption vector of A to the saddle point with only A, before ending in the stable point with only the B present. Note that time plots a, c are almost identical, up to the role switch between both consumers and resources