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src/HOL/Lifting_Sum.thy
changeset 55931 62156e694f3d
parent 55564 e81ee43ab290
child 55943 5c2df04e97d1 
--- a/src/HOL/Lifting_Sum.thy	Thu Mar 06 12:17:26 2014 +0100
+++ b/src/HOL/Lifting_Sum.thy	Thu Mar 06 13:36:15 2014 +0100
@@ -59,8 +59,7 @@
 lemma Quotient_sum[quot_map]:
   assumes "Quotient R1 Abs1 Rep1 T1"
   assumes "Quotient R2 Abs2 Rep2 T2"
-  shows "Quotient (sum_rel R1 R2) (sum_map Abs1 Abs2)
-    (sum_map Rep1 Rep2) (sum_rel T1 T2)"
+  shows "Quotient (sum_rel R1 R2) (map_sum Abs1 Abs2) (map_sum Rep1 Rep2) (sum_rel T1 T2)"
   using assms unfolding Quotient_alt_def
   by (simp add: split_sum_all)
isabelle