Stability Switches and Hopf Bifurcation in a Coupled FitzHugh-Nagumo Neural System with Multiple Delays

Figure 8

Distribution of partial eigenvalues for the fixed coupling weight 𝑐=0.8 and time delay 𝜏₂=0, where the asterisk in green represents the eigenvalues with negative real part and one with positive real part is in red color. The other parameters are fixed as 𝑎=0.33, 𝑏=1, and 𝛾=0.47.

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