Fri, 20 Oct 2017 23:29:43 +0200 more ambitious test;
wenzelm [Fri, 20 Oct 2017 23:29:43 +0200] rev 66887
more ambitious test;
Fri, 20 Oct 2017 07:46:10 +0200 added lemmas and tuned proofs
haftmann [Fri, 20 Oct 2017 07:46:10 +0200] rev 66886
added lemmas and tuned proofs
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