Tue, 07 Nov 2000 17:52:12 +0100 berghofe - Moved rewriting functions to meta_simplifier.ML
Tue, 07 Nov 2000 17:50:21 +0100 berghofe moved rewriting functions from Drule to MetaSimplifier
Tue, 07 Nov 2000 17:48:25 +0100 berghofe - new theorems imp_cong and swap_prems_eq
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