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src/ZF/Induct/Rmap.thy
changeset 76216 9fc34f76b4e8
parent 76215 a642599ffdea
child 76217 8655344f1cf6 
--- a/src/ZF/Induct/Rmap.thy	Tue Sep 27 17:46:52 2022 +0100
+++ b/src/ZF/Induct/Rmap.thy	Tue Sep 27 17:54:20 2022 +0100
@@ -46,7 +46,7 @@
   done
 
 lemma rmap_functional: "function(r) \<Longrightarrow> function(rmap(r))"
-  apply (unfold function_def)
+    unfolding function_def
   apply (rule impI [THEN allI, THEN allI])
   apply (erule rmap.induct)
    apply blast+
isabelle