$ of the critical surface $\varphi(T,\mu_u,\mu_d,\mu_s,\gamma_s)=\ln 0-0$ for $T_0=000$ MeV at $\gamma_s=0$.  Projections on the $(T,\mu_s)$-plane of intersections, at fixed $\lambda_u$ $(\mu_u/T=0.0)$, of the $<S>=0$ and $<B>=0\beta<Q>$ surfaces for the SSBM and the IHG for different values of $\beta$. For the SSBM case $T_0$ is set at 000 MeV.  Projections on the $(\mu_u,\mu_d)$-plane of intersections, at fixed $\lambda_u$ $(\mu_u/T=0.0)$, of the $<S>=0$ and $<B>=0\beta<Q>$ surfaces for the SSBM and the IHG