Tue, 31 Mar 2020 15:51:15 +0200 nipkow cleaned proofs
Mon, 30 Mar 2020 19:50:01 +0200 wenzelm clarified signature;
Mon, 30 Mar 2020 19:39:11 +0200 wenzelm more accurate treatment of errors;
Mon, 30 Mar 2020 11:59:44 +0200 wenzelm clarified modules: global quasi-scope for markers;
Mon, 30 Mar 2020 10:35:10 +0200 nipkow redunant simp rule
Sun, 29 Mar 2020 23:54:00 +0100 paulson merged
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