Thu, 27 Jul 2000 18:27:09 +0200 export has_internal;
wenzelm [Thu, 27 Jul 2000 18:27:09 +0200] rev 9455
export has_internal; tag some rules as internal;
Thu, 27 Jul 2000 18:25:55 +0200 added thm_deps;
wenzelm [Thu, 27 Jul 2000 18:25:55 +0200] rev 9454
added thm_deps;
Thu, 27 Jul 2000 18:25:44 +0200 added enter_forward_proof;
wenzelm [Thu, 27 Jul 2000 18:25:44 +0200] rev 9453
added enter_forward_proof;
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