Limit Cycles and Invariant Curves in a Class of Switching Systems with Degree Four

Table 1

The maximum number of small limit cycles around the origin for different parameter c.

Parameter c	The maximum number of small limit cycle around the origin
	6
	7
-2.09067	8
	7
-1.94278	8
	7
-0.7632018	8
	7
	6
	7
	6
	7
0	3
	7
	6
(0.129745,0.581824)	7
0.581824	8
(0.581824,0.707107]	7
(0.707107,)	6