Dynamical Analysis of a Modified Lorenz System

Figure 1

The possible phase portraits for system (16): (a) saddle point, (b) stable node point, (c) stable focus, (d) degenerate stable node, (e) unstable node point, (f) unstable focus, (g) degenerate unstable node, (h) 𝜆₂>0, and (i) 𝜆₂<0.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)