Figure 5From: Co-dimension two bifurcations analysis of a delayed tumor model with Allee effectBifurcation diagram of the Hopf–Hopf point. H-1 and H-2 represent two Hopf bifurcation curves, and their intersection is the Hopf–Hopf bifurcation. There are two torus bifurcation curves originating from the Hopf–Hopf point, TB-1 and TB-2. \(\tau -r\) plane is divided into six regions, defined as \(D1-D6\)Back to article page