added many images

tikz/topology-paths-in-r2/Makefile

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+SOURCE = topology-paths-in-r2
+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:
+	#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

tikz/topology-paths-in-r2/Readme.md

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+Compiled example
+----------------
+![Example](topology-paths-in-r2.png)

tikz/topology-paths-in-r2/topology-paths-in-r2.tex

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+\documentclass[varwidth=true, border=2pt]{standalone}
+
+\usepackage{pgfplots}
+\usepackage{tikz}
+
+\begin{document}
+\begin{tikzpicture}
+    \begin{axis}[
+        legend pos=south west,
+        axis x line=middle,
+        axis y line=middle,
+        %grid = major,
+        width=9cm,
+        height=9cm,
+        grid style={dashed, gray!30},
+        xmin=-2,     % start the diagram at this x-coordinate
+        xmax= 1,    % end   the diagram at this x-coordinate
+        ymin=-1,     % start the diagram at this y-coordinate
+        ymax= 5,   % end   the diagram at this y-coordinate
+        %axis background/.style={fill=white},
+        %xlabel=$x$,
+        %ylabel=$y$,
+        ticks=none,
+        %tick align=outside,
+        %minor tick num=-3,
+        enlargelimits=true,
+        tension=0.08]
+        \addplot[mark=none, orange, smooth cycle, thick, tension=1, dashed] coordinates {%
+   (0,0) (-1,1) (-2,2) (-1,3) (0, 3) (1, 4)};
+        \addplot[mark=none, blue, smooth cycle, thick, tension=3] coordinates {%
+   (0,0) (-1,1) (-2,2) (-1,3) (0, 3) (1, 4)};
+    \end{axis} 
+\end{tikzpicture}
+\end{document}