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src/HOL/NSA/StarDef.thy
changeset 40815 6e2d17cc0d1d
parent 39302 d7728f65b353
child 45542 4849dbe6e310 
--- a/src/HOL/NSA/StarDef.thy	Mon Nov 29 12:15:14 2010 +0100
+++ b/src/HOL/NSA/StarDef.thy	Mon Nov 29 13:44:54 2010 +0100
@@ -62,7 +62,7 @@
 by (simp add: starrel_def)
 
 lemma equiv_starrel: "equiv UNIV starrel"
-proof (rule equiv.intro)
+proof (rule equivI)
   show "refl starrel" by (simp add: refl_on_def)
   show "sym starrel" by (simp add: sym_def eq_commute)
   show "trans starrel" by (auto intro: transI elim!: ultra)
isabelle