Fig. 14
From: Coupling effects on turning points of infectious diseases epidemics in scale-free networks
The location shift of the saddle point of VRTP curve along decreasing γ. The shifting of the saddle point of VRTP curve. Normally there are two peaks and a saddle point in VRTP curve. The curve is influenced by two factors, γ and (β,k). Changes of β and k increase the speed of epidemic spreading. As a result, the slight shift of VRTP curve to left happens. On the contrary, the increase of γ results in the shift to the right because the speed of spreading decreases