Wed, 09 Nov 2005 16:26:41 +0100 wenzelm Thm.varifyT': natural argument order;
Wed, 09 Nov 2005 12:21:05 +0100 haftmann added join function
Tue, 08 Nov 2005 15:26:35 +0100 haftmann allowing indentation of 'theory' keyword
Tue, 08 Nov 2005 10:44:40 +0100 wenzelm simplified after_qed;
Tue, 08 Nov 2005 10:43:15 +0100 wenzelm avoid prove_plain, export_plain, simplified after_qed;
Tue, 08 Nov 2005 10:43:13 +0100 wenzelm removed export_plain;
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