\setlength{\unitlength}{4144sp}%
%
\begingroup\makeatletter\ifx\SetFigFont\undefined%
\gdef\SetFigFont#1#2#3#4#5{%
  \reset@font\fontsize{#1}{#2pt}%
  \fontfamily{#3}\fontseries{#4}\fontshape{#5}%
  \selectfont}%
\fi\endgroup%
\begin{picture}(4751,1215)(-1510,-511)
\thinlines
\multiput(1441,479)(111.42857,0.00000){11}{\line( 1, 0){ 55.714}}
\put(2611,479){\vector( 1, 0){0}}
\put(3151,-286){\vector( 0, 1){540}}
\put(901,254){\vector( 0,-1){540}}
\put(1441,-421){\vector( 1, 0){1170}}
\put(1441,-376){\line( 0,-1){ 90}}
\put(2026,-331){\makebox(0,0)[b]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$\Delta$}}}
\put(3241,-61){\makebox(0,0)[lb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$\sigma$}}}
\put(811,-61){\makebox(0,0)[rb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$\sigma^{-1}$}}}
\put(2701,389){\makebox(0,0)[lb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$(b_{k+1}(\varrho'),\zeta',i',k)$}}}
\put(2701,-511){\makebox(0,0)[lb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$(\varrho',\zeta',i',k')$}}}
\put(1351,-511){\makebox(0,0)[rb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$(b_{k+1}^{-1}(\xi),\zeta,i,k)$}}}
\put(1351,389){\makebox(0,0)[rb]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$(\tilde\xi,\zeta,i,k)$}}}
\put(2026,569){\makebox(0,0)[b]{\smash{\SetFigFont{17}{20.4}{\familydefault}{\mddefault}{\updefault}$\tilde\Delta$}}}
\end{picture}
