848613.fig.004a
(a)
848613.fig.004b
(b)
848613.fig.004c
(c)
848613.fig.004d
(d)
848613.fig.004e
(e)
848613.fig.004f
(f)
848613.fig.004g
(g)
Figure 4: Phase portraits for (from top-left to bottom-right): 2.5 2 ; 0 (heteroclinic connections between two saddles of associated system, ); 1; 2 ( ); 2.5 .