% de naeste seks makroer anvendes internt % de kan uden problemer fjernes i hele filen \let\START\relax \let\STOP\relax \let\SPECEXTSTART\relax \let\SPECEXTSTOP\relax \let\DCBEGIN\relax \let\DCEND\relax \DCBEGIN \documentclass[a4paper]{article} \DCEND \usepackage [latin1]{inputenc} \usepackage [T1]{fontenc} \usepackage [danish]{babel} \usepackage {felineekssupp} \usepackage {kpfonts} \usepackage [scaled=0.8]{beramono} \usepackage [scaled=0.85]{berasans} % al anvendelse af geometry i eksemplerne boer man slette, % dette anvendes mht. at stoerrelsen skal passe til brug i bogen \usepackage{geometry} \geometry{textwidth=386.5pt} % vil ikke have sidetal med, fjern selv \pagestyle{empty} % forfatteren snyder maaske, fjern kode fra HER --> % <-- til HER. \START \usepackage{tikz} \STOP \begin{document} \tikzstyle{knude}=[circle,draw=blue!50,fill=blue!20,thick] \begin{tikzpicture}[shorten >=2pt] \node (a_1) at (0,0) [knude] {$a_1$}; \node (a_2) at (1,2) [knude] {$a_2$}; \node (a_3) at (2.5,1) [knude] {$a_3$}; \node (a_4) at (4,2) [knude] {$a_4$}; \node (a_5) at (5,0) [knude] {$a_5$}; \node (a_6) at (1.5,-1.25) [knude] {$a_6$}; \node (a_7) at (4,-1.25) [knude] {$a_7$}; \draw[->] (a_1) -- node [auto,swap] {5} (a_2); \draw[->] (a_2) -- node [auto] {3} (a_4) -- node [auto] {$-2$} (a_5); \draw[->] (a_2) -- node [auto,swap] {12} (a_3); \draw[->] (a_3) -- node [auto,swap] {0} (a_4); \draw[->] (a_1) -- node [auto] {$x$} (a_6) -- (a_5); \draw[->,dashed] (a_7) -- (a_5); \draw[->,red,thick] (a_1) to [out=0,in=-100] (a_4); \end{tikzpicture} \end{document}