--- a/NEWS Fri Dec 23 15:34:18 2011 +0100
+++ b/NEWS Fri Dec 23 15:55:23 2011 +0100
@@ -84,6 +84,7 @@
word_left_minus ~> left_minus
word_diff_0_right ~> diff_0_right
word_diff_self ~> diff_self
+ word_sub_def ~> diff_minus
word_diff_minus ~> diff_minus
word_add_ac ~> add_ac
word_mult_ac ~> mult_ac
--- a/src/HOL/Word/Word.thy Fri Dec 23 15:34:18 2011 +0100
+++ b/src/HOL/Word/Word.thy Fri Dec 23 15:55:23 2011 +0100
@@ -247,10 +247,6 @@
lemmas wi_hom_syms = wi_homs [symmetric]
-lemma word_sub_def: "a - b = a + - (b :: 'a :: len0 word)"
- unfolding word_sub_wi diff_minus
- by (simp only : word_uint.Rep_inverse wi_hom_syms)
-
lemma word_of_int_sub_hom:
"(word_of_int a) - word_of_int b = word_of_int (a - b)"
by (simp add: word_sub_wi arths)