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src/HOL/Power.thy
changeset 35216 7641e8d831d2
parent 35028 108662d50512
child 35828 46cfc4b8112e 
--- a/src/HOL/Power.thy	Thu Feb 18 13:29:59 2010 -0800
+++ b/src/HOL/Power.thy	Thu Feb 18 14:21:44 2010 -0800
@@ -332,7 +332,7 @@
 
 lemma abs_power_minus [simp]:
   "abs ((-a) ^ n) = abs (a ^ n)"
-  by (simp add: abs_minus_cancel power_abs) 
+  by (simp add: power_abs)
 
 lemma zero_less_power_abs_iff [simp, noatp]:
   "0 < abs a ^ n \<longleftrightarrow> a \<noteq> 0 \<or> n = 0"
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