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src/HOL/Word/BinInduct.thy
changeset 24412 9c7bb416f344
parent 24410 2943ae5255d0 
--- a/src/HOL/Word/BinInduct.thy	Thu Aug 23 16:47:16 2007 +0200
+++ b/src/HOL/Word/BinInduct.thy	Thu Aug 23 18:47:08 2007 +0200
@@ -126,7 +126,7 @@
 lemma bin_last_Min [simp]: "bin_last Numeral.Min = bit.B1"
   by (subst Min_1_eq [symmetric], rule bin_last_BIT)
 
-lemma bin_rest_BIT_bin_last: "(bin_rest x) BIT (bin_last x) = x"
+lemma bin_rest_BIT_bin_last [simp]: "(bin_rest x) BIT (bin_last x) = x"
   by (cases x rule: BIT_cases) simp
 
 lemma wf_bin_rest:
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