Figure 4

Dynamics behaviors of system ( 4.4 ) with initial values \(\pmb{(\varphi(\theta),\psi(\theta))^{T}=(0.09,0.07)^{T}}\) , \(\pmb{(0.1,0.2)^{T}}\) and \(\pmb{(0.3,0.4)^{T}}\) , \(\pmb{\theta\in[-1,0]}\) .