Bifurcation Analysis in a Kind of Fourth-Order Delay Differential Equation

Figure 2

The zero solution of system (4.1) is asymptotically stable when $\tau =0.4$.

(a) y-x phase plots

(b) y waveform

(c) x waveform

(d) v-u phase plots

(e) v waveform

(f) u waveform