Sat, 25 Feb 2012 09:07:39 +0100 bulwahn removing unnecessary assumptions in RealDef;
Sat, 25 Feb 2012 09:07:37 +0100 bulwahn one general list_all2_update_cong instead of two special ones
Sat, 25 Feb 2012 13:17:38 +0100 wenzelm tuned comments;
Sat, 25 Feb 2012 13:13:14 +0100 wenzelm standard Graph instances;
Sat, 25 Feb 2012 13:00:32 +0100 wenzelm clarified signature -- avoid oddities of Iterable like Iterator.map;
Sat, 25 Feb 2012 12:34:56 +0100 wenzelm discontinued slightly odd Graph.del_nodes (inefficient due to full Table.map);
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