A schematic picture of the intersection of the two curves that represent the solution to the gap equation (red) and the |$\varphi $| flat condition (blue). The horizontal axis is denoted by |$\varphi /M$| and the vertical one by |$\Delta _0$|⁠. The values at the stationary point (⁠|$\Delta _{0*}, \varphi _*=\bar {\varphi }_*$|⁠) are read off from the intersection point.