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authorKarl Berry <karl@freefriends.org>2009-05-17 22:41:33 +0000
committerKarl Berry <karl@freefriends.org>2009-05-17 22:41:33 +0000
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diagmac2 2.1 (16may09)
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+This is the README for diagmac2, Version 2.1 (May 2009)
+
+John Reynolds's diagram macros (available from
+http://www.cs.cmu.edu/~jcr/ and at CTAN in macros/latex/contrib/misc)
+have been in use since 1987, particularly for commutative diagrams.
+Although originally written for use with latex209, they do work with
+more recent formats such as latex2e and pdflatex, but the diagmac macros
+are based on the original picture environment in LaTeX and inherit its
+limitations on line slopes and circle diameters.
+
+diagmac2.sty is a modification of the macros to allow use of the pict2e
+package (available at CTAN in macros/latex/contrib) so that there are
+effectively no restrictions on line slopes or circle diameters. Starting
+in Version 2.1, some extensions have been added. Also, the User's Manual
+has been \TeXified (diagmac2.tex) and expanded, including several
+examples. The test file (diagmactest.tex) is as originally released by
+Reynolds (but modified to load diagmac2.sty).
+
+At Reynolds's ftp site, there is the following disclaimer:
+
+ These macros are in the public domain, and have not changed in many
+ years. Acknowledgement of their usage is not necessary. However,
+ neither I nor CMU accept any responsibility for the consequences of
+ errors in these macros or their documentation. This is more than the
+ usual disclaimer; TeX is a beastly language for programming anything
+ complex, and I am not an expert in its use, so that there are probably
+ errors lurking in the macros.
+
+In fact, after more than 20 years of intensive use by dozens of
+enthusiastic users, it seems that not a single error has been
+discovered.
+
+The licence for diagmac2.sty and diagmac2.tex is LPPL.
+
+Bob Tennent
+School of Computing
+Queen's University
+Kingston, Canada K7L 3N6
+rdt@cs.queensu.ca