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src/HOL/Real/PNat.thy
changeset 8856 435187ffc64e
parent 7562 8519d5019309
child 10834 a7897aebbffc 
--- a/src/HOL/Real/PNat.thy	Wed May 10 21:04:16 2000 +0200
+++ b/src/HOL/Real/PNat.thy	Wed May 10 22:34:30 2000 +0200
@@ -6,7 +6,7 @@
 *) 
 
 
-PNat = Arith +
+PNat = Main +
 
 typedef
   pnat = "lfp(%X. {1} Un (Suc``X))"   (lfp_def)
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