Table 2: Nonzero eigenvalues and attractor types for different memristor initial conditions.

Nonzero eigenvaluesStability regionsAttractor types

0 Region I: 3P0N Double-scroll chaotic 
attractor
(Unstable node-foci)
2 Region I: 3P0N Infinite
(Unstable node-foci)
2.4 Region II: 1P2N Chaotic spiral attractor
(Unstable saddle-foci)
3.2 Region III: 0P3N Stable point attractor
(Stable node-foci)
4.3 Region VI: 2P1N Stable point attractor
(Unstable saddle-foci)
4.5 Region VI: 2P1N Limit cycle with period 1
(Unstable saddle-foci)
4.8Region VI: 2P1N Asymmetric double- 
scroll chaotic attractor
(Unstable saddle-foci)