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src/HOL/Library/Set_Algebras.thy
changeset 69313 b021008c5397
parent 64267 b9a1486e79be
child 75450 f16d83de3e4a 
--- a/src/HOL/Library/Set_Algebras.thy	Sun Nov 18 09:51:41 2018 +0100
+++ b/src/HOL/Library/Set_Algebras.thy	Sun Nov 18 18:07:51 2018 +0000
@@ -408,8 +408,8 @@
   by (auto simp: set_times_def)
 
 lemma set_times_UNION_distrib:
-  "A * UNION I M = (\<Union>i\<in>I. A * M i)"
-  "UNION I M * A = (\<Union>i\<in>I. M i * A)"
+  "A * \<Union>(M ` I) = (\<Union>i\<in>I. A * M i)"
+  "\<Union>(M ` I) * A = (\<Union>i\<in>I. M i * A)"
   by (auto simp: set_times_def)
 
 end
isabelle