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src/HOL/IntDef.thy
changeset 23879 4776af8be741
parent 23852 3736cdf9398b
child 23950 f54c0e339061 
--- a/src/HOL/IntDef.thy	Fri Jul 20 14:27:56 2007 +0200
+++ b/src/HOL/IntDef.thy	Fri Jul 20 14:28:01 2007 +0200
@@ -218,7 +218,7 @@
 apply (auto simp add: zmult_zless_mono2_lemma)
 done
 
-instance int :: minus
+instance int :: abs
   zabs_def: "\<bar>i\<Colon>int\<bar> \<equiv> if i < 0 then - i else i" ..
 
 instance int :: distrib_lattice
isabelle