Fri, 15 Feb 2008 16:09:12 +0100 haftmann <= and < on nat no longer depend on wellfounded relations
Fri, 15 Feb 2008 16:09:10 +0100 haftmann moved *_reorient lemmas here
Fri, 15 Feb 2008 14:20:51 +0100 wenzelm tuned names;
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