Dosiero:Separation axioms.png
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A diagram of the relationships between the separation axioms.
Source: TeX source by Toby Bartels. Compiled and converted to PNG by Dbenbenn.
Licence: No rights reserved. See http://math.ucr.edu/~toby/copyright/. The image itself is pure information and thus probably not copyrightable. The source below is more likely to be copyrightable, but there are still no rights reserved.
TeX source by Toby Bartels using Xy-pic:
%&plain \def \frac #1#2Template:\mathstrut \input xy \xyoption {all} \xyoption {ps} \xyoption {dvips} \nopagenumbers \xymatrix @!0 { & \relax \bullet / \rm P T _ 4 \\ \relax \rm P N / \bullet \ar @{-} [ur] & & \relax \bullet / \rm T _ 5 \ar @{-} [ul] \\ & \relax \rm C N / \bullet \ar @{-} [ul] \ar @{-} [ur] & & \relax \bullet / \rm T _ 4 \ar @{-} [ul] \\ & & \relax \rm N / \bullet \ar @{-} [ul] \ar @{-} [ur] & & \relax \rm C R / T _ { 3 \frac 1 2 } \ar @{-} [ul] \\ & & & & & \relax \bullet / \bullet \ar @{-} [ul] \\ & & & & \relax \bullet / \rm C T _ 2 \ar @{-} [ur] & & \relax \rm R / T _ 3 \ar @{-} [ul] \\ & & & & & \relax \bullet / \rm T _ { 2 \frac 1 2 } \ar @{-} [ul] \ar @{-} [ur] \\ & & & & \relax \rm R _ 1 / T _ 2 \ar @{-} [ur] \\ & & & \relax \rm R _ 0 / T _ 1 \ar @{-} [ur] \\ & & - / \rm T _ 0 \ar @{-} [uuuuuu] \ar @{-} [ur] } \bye
To produce the current image, Dbenbenn saved the above as "Separation_axioms.tex", then ran the following commands:
tex Separation_axioms.tex dvips -mode ljfzzz -D 1200 Separation_axioms -o convert -density 1200 Separation_axioms.ps Separation_axioms.pnm pnmcrop Separation_axioms.pnm | pnmtopng > Separation_axioms.png.uncrush pngcrush -cc -reduce -brute -l 9 Separation_axioms.png.uncrush Separation_axioms.png
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