Sat, 02 Dec 2017 16:50:53 +0000 haftmann cleaned up and tuned
Sat, 02 Dec 2017 16:50:53 +0000 haftmann generalized more lemmas
Fri, 01 Dec 2017 20:49:42 +0100 wenzelm tuned output;
Fri, 01 Dec 2017 20:41:59 +0100 wenzelm more operations;
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