src/ZF/Main.ML

1) Fixed bug in Defs.merge_edges_1.
2) Major optimization of Defs.define: do not store dependencies between constants that
cannot introduce cycles anyway. In that way, the cycle test adds almost no overhead to
theories that define their constants in HOL-light / HOL4 style.
3) Cleaned up Defs.graph, no superfluous name tags are stored anymore.

structure Main =
struct
  val thy = the_context ();
end;

simpset_ref() := simpset() setmksimps (map mk_eq o Ord_atomize o gen_all);