![]() |
\begin{figure}[H] \begin{center} \unitlength=4pt \begin{picture}(45, 43)(0,-20) \gasset{Nw=5,Nh=5,Nmr=2.5,curvedepth=0} \thinlines \node[Nmarks=if,iangle=180,fangle=180](A0)(0,0){$1$} \node[Nmarks=f,fangle=90](A1)(15,15){$2$} \node(A)(25,0){$0$} \node[Nmarks=f,fangle=0](A3)(45,0){$4$} \node(A4)(15,-15){$5$} \node[Nmarks=f,fangle=0](A5)(35,-15){$6$} \node[Nmarks=f,fangle=0](A12)(35,15){$3$} \drawedge(A0,A1){$a$} \drawedge[ELside=r](A0,A4){$b$} \drawedge(A1,A12){$a$} \drawedge(A1,A){$b$} \drawedge[ELside=r](A3,A){$b$} \drawedge[ELside=r](A4,A){$b$} \drawedge[ELside=r](A5,A){$a$} \drawloop[loopangle=180](A){$a,b$} \drawloop[loopangle=90](A12){$a$} \gasset{curvedepth=3} \drawedge(A12,A3){$b$} \drawedge(A3,A12){$a$} \gasset{curvedepth=2} \drawedge(A4,A5){$a$} \drawedge(A5,A4){$b$} \end{picture} \end{center} \end{figure} |