Sun, 07 Jun 2015 20:03:40 +0200 wenzelm tuned signature;
Sun, 07 Jun 2015 15:35:49 +0200 wenzelm tuned signature;
Sun, 07 Jun 2015 15:01:07 +0200 wenzelm tuned signature;
Sun, 07 Jun 2015 14:36:36 +0200 wenzelm tuned;
Sun, 07 Jun 2015 12:55:42 +0200 wenzelm tuned;
Sun, 07 Jun 2015 12:55:28 +0200 wenzelm tuned;
Sun, 07 Jun 2015 12:43:06 +0200 wenzelm tuned whitespace;
Sat, 06 Jun 2015 13:38:24 +0200 wenzelm more tight treatment of subgoals: main goal may refer to extra variables;
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