Figure 7

Bifurcation diagram varying β ₂ . The bifurcation diagram of $\bar{T}$ varying β₂, showing the attracting regions. With respect to the coordinates of small equilibrium point ${\bar{Q}}_{<}^{*}$ for ${\beta }_2<{\beta }_2^{th}$, the trivial ${\bar{Q}}^0$ is attractor for initial conditions in region I, and for regions II and III, trajectories are attracted to ${\bar{Q}}_{>}^{*}$. For ${\beta }_2>{\beta }_2^{th}$, all initial conditions (region Ia) are attracted to ${\bar{Q}}^0$. The scales of vertical and horizontal axes must be multiplied by the factors shown in the legends to obtain the actual values.