Fri, 16 Dec 2011 11:02:55 +0100 wenzelm tuned;
Fri, 16 Dec 2011 10:52:35 +0100 wenzelm clarified modules that contribute to datatype package;
Fri, 16 Dec 2011 10:38:38 +0100 wenzelm tuned signature;
Thu, 15 Dec 2011 21:46:52 +0100 wenzelm merged;
Thu, 15 Dec 2011 19:53:28 +0100 wenzelm tuned;
Thu, 15 Dec 2011 16:10:44 +0100 noschinl add complementary lemmas for {min,max}_least
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