replace iszero_number_of_Pls with iszero_0 in rel_simps
authorhuffman
Tue, 21 Aug 2007 20:52:18 +0200
changeset 24392 000327cea3eb
parent 24391 b57c48f7e2d4
child 24393 b9718519f3d2
replace iszero_number_of_Pls with iszero_0 in rel_simps
src/HOL/Numeral.thy
--- a/src/HOL/Numeral.thy	Tue Aug 21 20:51:10 2007 +0200
+++ b/src/HOL/Numeral.thy	Tue Aug 21 20:52:18 2007 +0200
@@ -543,12 +543,14 @@
 text {* Simplification of relational operations *}
 
 lemmas rel_simps [simp] = 
-  eq_number_of_eq iszero_number_of_Pls nonzero_number_of_Min
+  eq_number_of_eq iszero_0 nonzero_number_of_Min
   iszero_number_of_0 iszero_number_of_1
   less_number_of_eq_neg
   not_neg_number_of_Pls not_neg_0 not_neg_1 not_iszero_1
   neg_number_of_Min neg_number_of_BIT
   le_number_of_eq
+(* iszero_number_of_Pls would never be used
+   because its lhs simplifies to "iszero 0" *)
 
 
 subsection {* Simplification of arithmetic when nested to the right. *}