Research Article

Interaction between Dark Matter and Dark Energy and the Cosmological Coincidence Problem

Table 5

Properties of the critical points.

Point Existence Stability

Saddle point 1 No

,
Stable node for left panel of Figure 2 with
(blue shaded region)  
stable spiral for left panel of Figure 2 with
(green shaded region)
1−1 1

,
Stable spiral for right panel of Figure 2 with
1

Saddle point if stable node for left panel of Figure 5 with
stable spiral for right panel of Figure 5 with
0


Saddle point if
stable node for left panel of Figure 6 with
stable spiral for right panel of Figure 6 with