L}_{{\mathrm{st}}}$, are uniquely determined once the $h_f$ are known [@Osipov:2004a; @Osipov:2006a]. The stability of the effective potential is guaranteed if the system (\[SPA\]) has only one real solution. For that the couplings must fulfill the inequalities [@Osipov:2005b]: $g_1>0,\, g_1+3g_2>0,\, 
Gg_1>(\kappa/16)^2$.

[TABLE I. Parameters of the model: $m_u=m_d,\, m_s$ (MeV), $G$ (GeV$^{-2}$), $\Lambda$ (MeV), $\kappa$ (GeV$^{-5}$), $g_1,\, g_2$ (GeV$^{-8}$). We also show the corresponding values of constituent quark masses $M_u=M_d$ and $M_s$ (MeV). ]{}

        $\ \ \ \ \ \ \ \ \ \ \ \ \ m_u$   $\ \ \ \ \ \ \ \ \ \ \ m_s$   $\ \ \ \ \ \ \ \ \ \ M_u$   $\ \ \ \ \ \ \ \ \ \ M_s$   $\ \ \ \ \ \ \ \ \ \ \Lambda$   $\ \ \ \ \ \ \ \ \ G$   $\ \ \ \ \ \ \ \ -\kappa$    $\ \ \ \ \ \ \ \ \ g_1$     $\ \ \ \ \ \ \ \ \ -g_2\ \ $     
  ---- --------------------------------- ----------------------------- --------------------------- --------------------------- ------------------------------- ----------------------- --------------------------- ---------------------------- ------------------------------ -- --
   a                        5.9                            186                          359                         554                           851                       10.92                      1001         $\ \ \ \ \ \ \ 