\begin{figure}[H] \begin{center} \unitlength=4pt \begin{picture}(40, 56)(0,-28) \gasset{Nw=6,Nh=6,Nmr=3,curvedepth=3} \thinlines \node[Nmarks=if,iangle=180,fangle=180](A0)(0,0){$0$} \node(A1)(5.86,14.14){$1$} \node(A2)(20,20){$2$} \node(A3)(34.14,14.14){} \node(A4)(34.14,-14.14){} \node[Nadjust=w](A5)(20,-20){$n-2$} \node[Nadjust=w](A6)(5.86,-14.14){$n-1$} \drawloop[loopangle=90](A1){$b$} \drawloop[loopangle=90](A2){$b$} \drawloop[loopangle=270](A5){$b$} \drawloop[loopangle=270](A6){$b$} \gasset{curvedepth=2} \drawedge(A0,A1){$a$} \drawedge(A1,A2){$a$} \drawedge(A2,A3){$a$} \drawedge(A4,A5){$a$} \drawedge(A5,A6){$a$} \drawedge(A6,A0){$a,b$} \drawedge(A1,A0){$b$} \gasset{curvedepth=6} \drawedge(A2,A0){$b$} \gasset{curvedepth=-6} \drawedge(A5,A0){$b$} \put(35.89,10.14){$.$} \put(37.24,8.14){$.$} \put(38.27,6.14){$.$} \end{picture} \end{center} \caption{L'automate ${\cal A}_n$.} \end{figure} |