. 2019 Aug 3;16(15):2775. doi: 10.3390/ijerph16152775

Table 7.

The evolutionary stability of local equilibrium points in Case 4.

Equilibrium Point	$\det J$	$t r J$	Results
$E_{1} (0, 0)$	+	−	ESS
$E_{2} (0, 1)$	−	$\pm$	Saddle point
$E_{3} (1, 0)$	−	$\pm$	Saddle point
$E_{4} (1, 1)$	+	+	Unstable point
$E_{5} (p^{}, q^{})$	+	0	Central point