Sat, 04 Feb 2017 19:48:43 +0100 wenzelm suppress warnings uniformly, even in explicit commands 'find_theorems', 'solve_direct';
Sat, 04 Feb 2017 19:10:12 +0100 wenzelm tuned;
Fri, 03 Feb 2017 23:24:45 +0100 wenzelm proper background certificate from make_context, which can be a super-theory of the direct join (amending d07464875dd4);
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