Figure 10From: Multiple bifurcations and periodic coexistence in a delayed Hopfield two-neural system with a monotonic activation functionHopf bifurcation curves in \((\tau _{1}, \tau _{\mathrm{s}})\)-plane illustrates the Hopf–Hopf bifurcation points (labeled as HH) for the fixed parameters \(a _{12} = 1\), \(a _{21} = - 3\), and \(\gamma = 1\), where S means stable equilibriumBack to article page