Tue, 13 Jun 2006 23:41:49 +0200 added equiv;
wenzelm [Tue, 13 Jun 2006 23:41:49 +0200] rev 19880
added equiv;
Tue, 13 Jun 2006 23:41:47 +0200 (un)varify: tuned exceptions;
wenzelm [Tue, 13 Jun 2006 23:41:47 +0200] rev 19879
(un)varify: tuned exceptions;
Tue, 13 Jun 2006 23:41:44 +0200 removed weak_eq_thm;
wenzelm [Tue, 13 Jun 2006 23:41:44 +0200] rev 19878
removed weak_eq_thm; added equiv_thm; removed obsolete unvarifyT; improved unvarify -- demands global context (cf. Logic.unvarify);
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