\documentclass[11pt]{report}
\input{header}
\pagestyle{empty}
\begin{document}
\psscalebox{1.8}{\arrset{0.4}%
  \begin{pspicture}(-6,-6)(14,13)
    \arraxes(0,0)(-6,-6)(14,13)
    \pscircle[linecolor=blue,linewidth=0.5pt](0,0){5}\rput(-4.3,4.2){$c_1$}
    \pscircle[linecolor=blue,linewidth=0.5pt](7,7){5}\rput(2.6,11.2){$c_2$}
    \pscircle[linecolor=blue,linewidth=0.5pt](4,-0.5){3.5}\rput(7.3,-3.4){$c_3$}
    \arrMainVertex(-5,0){a1}
    \arrMainVertex(5,0){a2}
    \arrMainVertex(2,7){b1}
    \arrMainVertex(12,7){b2}
    \arrMainVertex(0.5,-0.5){c1}
    \arrMainVertex(7.5,-0.5){c2}
    \arrEmptyVertex(3,4){x1}
    \arrMinorVertex(4,3){x2}\uput[45]{0}(4,3){$v_{\mathrm{max}}$}
    \arrEmptyVertex(6.45,2.05){x3}
  \end{pspicture}
}
\end{document}
