\documentclass[11pt]{report}
\input{header}
\pagestyle{empty}
\begin{document}
\psscalebox{1.8}{\arrset{0.8}%
  \pspicture[](-2,-1)(2,2)
  \arraxes(0,0)(-2,-1)(2,2)
  \psplot[linecolor=blue,linewidth=0.5pt]{-1}{0.5}{x x mul 1 x sub div}\rput(0.22,0.4){$c_1$}
  \psarc[linecolor=blue,linewidth=0.5pt](0,0.5){0.5}{180}{0}\rput(-0.3,-0.2){$c_2$}
  %
  \arrMainVertex(-0.5,0.5){1}%
  \arrMainVertex(0.5,0.5){2}%
  \arrMainVertex(-1,0.5){3}%
  \arrEmptyVertex(0,0){3}%
  %
  \endpspicture
}
\end{document}
