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+This document is a port to LaTeX of the document
+"https://www.tug.org/texshowcase/cheat.pdf" produced and written in plain TeX.
+The original TeX document was written by Steve Seiden.
+
+The only copyright notice found about the original document was this one:
+ I grant permission for you to reproduce this cheat sheet, and redistribute
+ it for educational purposes only. You may not reproduce it for profit.
+ If you reproduce it, you must not alter or delete my copyright.
+
+For the code specific to the LaTeX port, the licence is LPPL or BSD licence (at your choice).
+
+The purpose of the port to LaTeX is to make it possible to use the document to test
+some Unicode math fonts and unicode TeX more easily. This seems to be difficult
+with Plain TeX while the use of a font other than the Computer Modern font
+is awfully complicated.
+
+This document is designed for use with almost any math fonts. However
+in this first version, it is tuned to work only with the fonts GFS NeoHellenic
+and GFS NeoHellenicMath.
+
+The next revision will provide the tuning necessary to use the most common
+math fonts in the TeX distribution.
+
+Alain Aubord
+Sourire Informatique
+tex.support@sourire.ch