Research Article
Interaction between Dark Matter and Dark Energy and the Cosmological Coincidence Problem
Table 1
Properties of the critical points.
| Point | Existence | Stability | | | |
| | , | Saddle point if and , unstable node if and | 1 | 1 | No |
| | , | Saddle point if and , unstable node if and | 1 | 1 | No |
| | , | Stable node if and , saddle point if | 1 | | |
| | , | Saddle point if | 0 | | |
| | | Stable node for left panel of Figure 1 Stable spiral for right panel of Figure 1 | | | |
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