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src/HOL/Lambda/ListBeta.thy
changeset 21404 eb85850d3eb7
parent 20503 503ac4c5ef91
child 22271 51a80e238b29 
--- a/src/HOL/Lambda/ListBeta.thy	Fri Nov 17 02:19:55 2006 +0100
+++ b/src/HOL/Lambda/ListBeta.thy	Fri Nov 17 02:20:03 2006 +0100
@@ -13,7 +13,7 @@
 *}
 
 abbreviation
-  list_beta :: "dB list => dB list => bool"   (infixl "=>" 50)
+  list_beta :: "dB list => dB list => bool"  (infixl "=>" 50) where
   "rs => ss == (rs, ss) : step1 beta"
 
 lemma head_Var_reduction:
isabelle