Thu, 11 May 2006 19:19:33 +0200 wenzelm tuned;
Thu, 11 May 2006 19:19:31 +0200 wenzelm avoid raw equality on type thm;
Thu, 11 May 2006 19:15:16 +0200 wenzelm replaced Graph.fold_nodes by general Graph.fold;
Thu, 11 May 2006 19:15:15 +0200 wenzelm added fold;
Thu, 11 May 2006 19:15:14 +0200 wenzelm tuned Defs.merge;
Thu, 11 May 2006 19:15:13 +0200 wenzelm allow dependencies of disjoint collections of instances;
Thu, 11 May 2006 19:15:12 +0200 wenzelm use IntGraph from Pure;
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