Tue, 18 Mar 2014 21:02:33 +0100 wenzelm merged;
Tue, 18 Mar 2014 18:09:31 +0100 wenzelm clarified module arrangement;
Tue, 18 Mar 2014 17:53:40 +0100 wenzelm simplified (despite 70898d016538);
Tue, 18 Mar 2014 17:39:03 +0100 wenzelm clarifed module name;
Tue, 18 Mar 2014 16:45:14 +0100 wenzelm tuned proofs;
Tue, 18 Mar 2014 16:44:51 +0100 wenzelm clarified module arrangement;
Tue, 18 Mar 2014 16:16:28 +0100 wenzelm clarified modules;
Tue, 18 Mar 2014 15:29:58 +0100 wenzelm more antiquotations;
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