Fri, 01 Sep 2006 23:18:01 +0200 wenzelm signature: do not export private stuff;
Fri, 01 Sep 2006 23:04:42 +0200 wenzelm skolem_cache_thm: Drule.close_derivation on clauses preserves some space;
Fri, 01 Sep 2006 20:44:16 +0200 wenzelm tuned;
Fri, 01 Sep 2006 20:40:05 +0200 wenzelm tuned;
Fri, 01 Sep 2006 20:17:31 +0200 wenzelm explain assumptions;
Fri, 01 Sep 2006 08:51:53 +0200 paulson refinements to conversion into clause form, esp for the HO case
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