added permutation sign

tikz/permutation-sign/Makefile

@@ -0,0 +1,35 @@
+SOURCE = permutation-sign
+DELAY = 80
+DENSITY = 300
+WIDTH = 512
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	make
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg
+	rsvg-convert -a -w $(WIDTH) -f svg $(SOURCE).svg -o $(SOURCE)2.svg
+	inkscape $(SOURCE)2.svg --export-plain-svg=$(SOURCE).svg
+	rm $(SOURCE)2.svg

tikz/permutation-sign/Readme.md

@@ -0,0 +1,3 @@
+Compiled example
+----------------
+![Example](permutation-sign.png)

tikz/permutation-sign/permutation-sign.tex

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+\documentclass{article}
+\usepackage[pdftex,active,tightpage]{preview}
+
+\usepackage{tikz}
+\usetikzlibrary{calc}
+
+\begin{document}
+\begin{preview}
+\tikzset{box/.style={fill=black!15,draw,minimum size=13pt,align=center}}
+
+\begin{tikzpicture}
+    \draw[very thick]      (-1,2.5) -- (-1,1.75);
+	\draw[<-,very thick]   (-1,0.5) -- (-1,1.3);
+
+    \draw[very thick]    (-0.3,0.5 ) -- (-0.3,1.3);
+	\draw[->,very thick] (-0.3,1.75) -- (-0.3,2.5);
+
+    \draw[very thick]     (0.3,2.5) -- (0.3,1.75);
+	\draw[<-,very thick]  (0.3,0.5) -- (0.3,1.3);
+
+    \draw[very thick]        (1,0.5) -- (1,1.3);
+	\draw[->,very thick]   ( 1,1.75) -- (1,2.5);
+
+    \node (one)   at (-0.8,2.2) {1};
+    \node (two)   at (-0.1,0.8) {2};
+    \node (three) at ( 0.5,2.2) {3};
+    \node (four)  at ( 1.2,0.8) {4};
+
+    \node[box] (odd)  at (0,3) {gerade\\Permutationen};
+    \node[box] (even) at (0,0) {ungerade\\Permutationen};
+
+	\node (transpositions) at (0,1.5) {Transpositionen};
+
+\end{tikzpicture}
+\end{preview}
+\end{document}