A Predator-Prey Model in the Chemostat with Time Delay

Figure 5

If the slope of 𝑆^𝑗𝑛(𝜏) is nonzero at 𝜏 when 𝑆^𝑗𝑛(𝜏)=0 (𝑗=1,2), the transversality condition holds and there is a Hopf bifurcation. The other parameters are the same as for Figure 4.

(a)

(b)