Fri, 19 Aug 2011 21:40:52 +0200 wenzelm incremental Proofterm.join_body, with join_thms step in fulfill_norm_proof -- avoid full graph traversal of former Proofterm.join_bodies;
Fri, 19 Aug 2011 18:01:23 +0200 wenzelm tuned;
Fri, 19 Aug 2011 17:39:37 +0200 wenzelm tuned signature (again);
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