Thu, 17 Oct 2019 17:24:13 +0200 clarified proof_boxes (requires prune_proofs=false);
wenzelm [Thu, 17 Oct 2019 17:24:13 +0200] rev 70892
clarified proof_boxes (requires prune_proofs=false);
Thu, 17 Oct 2019 16:10:44 +0200 tuned;
wenzelm [Thu, 17 Oct 2019 16:10:44 +0200] rev 70891
tuned;
Thu, 17 Oct 2019 14:06:14 +0200 more robust;
wenzelm [Thu, 17 Oct 2019 14:06:14 +0200] rev 70890
more robust;
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