A Complex Dynamic of an Eco-Epidemiological Mathematical Model with Migration

Table 1

Various possibilities for positive real roots of .

Cases					Number of sign changes	Number of positive roots
1	+	+	+	+	0	0
2	+	+	+	—	1	1
3	+	+	—	—	1	1
4	+	—	—	—	1	1
5	+	—	+	+	2	0,2
6	+	+	—	+	2	0,2
7	+	—	—	+	2	0,2
8	+	—	+	—	3	1,3