Sat, 28 Oct 2017 16:12:29 +0200 wenzelm avoid slow proofs due to simp rules from 960509bfd47e;
Fri, 27 Oct 2017 17:06:30 +0200 wenzelm some concrete commands;
Fri, 27 Oct 2017 17:04:41 +0200 wenzelm tuned signature;
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