Sat, 18 Jul 2009 00:33:57 +0200 wenzelm tuned prf_subst: use structure Same;
Fri, 17 Jul 2009 23:13:57 +0200 wenzelm merged
Fri, 17 Jul 2009 13:12:18 -0400 avigad Changed fact_Suc_nat back to fact_Suc
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