% 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=412.0pt} % vil ikke have sidetal med, fjern selv \pagestyle{empty} % forfatteren snyder maaske, fjern kode fra HER --> % <-- til HER. \START \usepackage{tikz} \usetikzlibrary{matrix} \STOP \begin{document} \[ \begin{tikzpicture} \matrix (M) [matrix of math nodes, row sep=2em,column sep=2em ] { A & B \\ C & D \\ % sidste \\ er VIGTIG }; \begin{scope}[execute at begin node=$\scriptstyle, execute at end node=$] \draw[->] (M-1-1) -- node[above] {\alpha} (M-1-2); \draw[->] (M-1-1) -- (M-2-1); \draw[->] (M-1-2) -- node[left] {\beta} (M-2-2); \path (M-2-1) -- node {\displaystyle\subseteq} (M-2-2); \end{scope} \end{tikzpicture} \] \end{document}