init

tikzgrafiken/08_1_1.tex

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+\documentclass{article}
+\usepackage{tikz}
+\usetikzlibrary{arrows}
+\usetikzlibrary{snakes}
+\usetikzlibrary{positioning}
+\usepackage{verbatim}
+
+
+\begin{document}
+
+\begin{tikzpicture}[scale=1.5, on grid]
+ \draw [help lines](-2,-2) grid (2,2);
+
+
+\draw[-triangle 45, color=blue] (-0.75,0.5) -- (0.75,-0.5) node[sloped,below] { $-$};
+\draw[-triangle 45, color=red] (0.75,0.5) -- (-0.75,-0.5) node[sloped,below] { $+$};
+
+\node[] at (0,0) {$\left( {\begin{array}{*{20}c}
+   {a_{11} } & {a_{12} }  \\
+   {a_{21} } & {a_{22} }  \\
+\end{array}} \right)
+$};
+
+
+
+\end{tikzpicture}
+\end{document}