 $$\begin{aligned} \psset{xunit=.00cm,yunit=.00cm} \begin{matrix} \pspicture(-.0,-.00)(0.0,0.00)  \psdots(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)   \psline(0,0)(0,0)   \psline(0,0)(0,0)\endpspicture \\ E_0 \end{matrix}\qquad \begin{matrix} \pspicture(-.0,-.00)(0.0,0.00)  \psdots(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)   \psline(0,0)(0,0)   \psline(0,0)(0,0)\endpspicture \\ E_0 \end{matrix}\qquad \begin{matrix} \pspicture(-.0,-.00)(0.0,0.00)  \psdots(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)(0,0)   \psline(0,0)(0,0)   \psline(0,0)(0,0)\endpspicture \\ E_0 \end{matrix}\