wenzelm [Tue, 04 May 2010 12:30:15 +0200] rev 36620
simplified/unified fundamental operations on types/terms/proofterms -- prefer Same.operation over "option" variant;
wenzelm [Tue, 04 May 2010 11:02:50 +0200] rev 36619
renamed Proofterm.freezeT to Proofterm.legacy_freezeT (cf. 88756a5a92fc);
wenzelm [Tue, 04 May 2010 10:52:43 +0200] rev 36618
specification goal: eliminated redundant Thm.legacy_freezeT -- the goal is properly declared and should always produce fixed types in the result;
specification result: replaced Thm.legacy_freezeT by Thm.unvarify_global -- the final result appears to be a closed term that is globally exported;
wenzelm [Mon, 03 May 2010 22:00:06 +0200] rev 36617
UNDISCH/DISJ_CASESL: eliminated slightly odd Thm.legacy_freezeT -- these rules appear to be applied to thms with fixed types only;
wenzelm [Mon, 03 May 2010 20:53:49 +0200] rev 36616
replaced Thm.legacy_freezeT by Thm.unvarify_global -- these facts stem from closed definitions, i.e. there are no term Vars;
wenzelm [Mon, 03 May 2010 20:13:36 +0200] rev 36615
renamed Thm.freezeT to Thm.legacy_freezeT -- it is based on Type.legacy_freeze;
wenzelm [Mon, 03 May 2010 16:26:47 +0200] rev 36614
minor tuning of Thm.strip_shyps -- no longer pervasive;