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src/HOL/Library/Multiset.thy
changeset 25140 273772abbea2
parent 25134 3d4953e88449
child 25162 ad4d5365d9d8 
--- a/src/HOL/Library/Multiset.thy	Sun Oct 21 19:32:19 2007 +0200
+++ b/src/HOL/Library/Multiset.thy	Sun Oct 21 22:33:35 2007 +0200
@@ -759,7 +759,7 @@
   apply (rule_tac x = "x # xa" in exI, auto)
   done
 
-lemma set_count_greater_0: "set x = {a. 0 < count (multiset_of x) a}"
+lemma set_count_greater_0: "set x = {a. count (multiset_of x) a \<noteq> 0}"
   by (induct x) auto
 
 lemma distinct_count_atmost_1:
isabelle