Fig. 4

The two-dimensional phase diagram of the system Eq. (11) for the case \(\:{\lambda\:}_{1}<0\) and \(\:{\lambda\:}_{2}<0\).
The two-dimensional phase diagram of the system Eq. (11) for the case \(\:{\lambda\:}_{1}<0\) and \(\:{\lambda\:}_{2}<0\).