added store_thms etc. (formerly in Thy/thm_database.ML);
added bind_thm(s) (formerly in old_goals.ML);
adapted to Context.thread_data interface;
removed obsolete get/set_context;
renamed ML_Context.>> to Context.>> (again);
lemma app_Nil2 [simp]: "xs @ [] = xs"
apply(induct_tac xs)
apply(auto)
done
lemma app_assoc [simp]: "(xs @ ys) @ zs = xs @ (ys @ zs)"
apply(induct_tac xs)
apply(auto)
done
lemma rev_app [simp]: "rev(xs @ ys) = (rev ys) @ (rev xs)"
apply(induct_tac xs)
apply(auto)
done
theorem rev_rev [simp]: "rev(rev xs) = xs"
apply(induct_tac xs)
apply(auto)
done
end