Sat, 13 Apr 2019 08:43:33 +0000 haftmann backed out a93e6472ac9c, which does not bring anything substantial: division_ring is not commutative in multiplication but semidom_divide is
Sat, 13 Apr 2019 08:11:48 +0000 haftmann tuned
Sat, 13 Apr 2019 08:11:47 +0000 haftmann more document structure
Sat, 13 Apr 2019 08:11:46 +0000 haftmann tuned
Sat, 13 Apr 2019 13:30:02 +0200 wenzelm more abbrevs;
Sat, 13 Apr 2019 12:45:38 +0200 wenzelm obsolete;
Fri, 12 Apr 2019 23:09:03 +0200 wenzelm merged
Fri, 12 Apr 2019 22:57:17 +0200 wenzelm updated documentation;
Fri, 12 Apr 2019 22:52:00 +0200 wenzelm avoid Isabelle symbols in URL;
Fri, 12 Apr 2019 22:24:57 +0200 wenzelm formal URLs;
Fri, 12 Apr 2019 22:24:07 +0200 wenzelm tuned spacing;
Fri, 12 Apr 2019 22:09:25 +0200 wenzelm modernized tags: default scope excludes proof;
Fri, 12 Apr 2019 19:48:29 +0200 wenzelm report document tags as seen in the text (not the active tag of Thy_Output.present_thy);
Fri, 12 Apr 2019 17:09:21 +0200 wenzelm support "tag" marker with scope;
Fri, 12 Apr 2019 12:29:20 +0100 paulson tidying up messy proofs about group element order
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