--- a/src/HOL/Int.thy Wed Dec 03 21:00:39 2008 -0800
+++ b/src/HOL/Int.thy Wed Dec 03 21:50:36 2008 -0800
@@ -1307,10 +1307,15 @@
"(number_of x::'a::{ordered_idom,number_ring}) \<le> number_of y \<longleftrightarrow> x \<le> y"
unfolding number_of_eq by (rule of_int_le_iff)
+lemma eq_number_of [simp]:
+ "(number_of x::'a::{ring_char_0,number_ring}) = number_of y \<longleftrightarrow> x = y"
+ unfolding number_of_eq by (rule of_int_eq_iff)
+
lemmas rel_simps [simp] =
less_number_of less_bin_simps
le_number_of le_bin_simps
- eq_number_of_eq iszero_0 nonzero_number_of_Min
+ eq_number_of eq_bin_simps
+ iszero_0 nonzero_number_of_Min
iszero_number_of_Bit0 iszero_number_of_Bit1
not_neg_number_of_Pls not_neg_0 not_neg_1 not_iszero_1
neg_number_of_Min neg_number_of_Bit0 neg_number_of_Bit1