diff -r c56d27155041 -r 79136ce06bdb src/HOL/Divides.thy
--- a/src/HOL/Divides.thy	Tue Mar 03 12:14:52 2009 +1100
+++ b/src/HOL/Divides.thy	Tue Mar 03 17:05:18 2009 +0100
@@ -684,16 +684,6 @@
 apply (blast intro: divmod_rel [THEN divmod_rel_mult1_eq, THEN div_eq])
 done
 
-lemma mod_mult1_eq: "(a*b) mod c = a*(b mod c) mod (c::nat)"
-by (rule mod_mult_right_eq)
-
-lemma mod_mult1_eq': "(a*b) mod (c::nat) = ((a mod c) * b) mod c"
-by (rule mod_mult_left_eq)
-
-lemma mod_mult_distrib_mod:
-  "(a*b) mod (c::nat) = ((a mod c) * (b mod c)) mod c"
-by (rule mod_mult_eq)
-
 lemma divmod_rel_add1_eq:
   "[| divmod_rel a c aq ar; divmod_rel b c bq br;  c > 0 |]
    ==> divmod_rel (a + b) c (aq + bq + (ar+br) div c) ((ar + br) mod c)"
@@ -706,9 +696,6 @@
 apply (blast intro: divmod_rel_add1_eq [THEN div_eq] divmod_rel)
 done
 
-lemma mod_add1_eq: "(a+b) mod (c::nat) = (a mod c + b mod c) mod c"
-by (rule mod_add_eq)
-
 lemma mod_lemma: "[| (0::nat) < c; r < b |] ==> b * (q mod c) + r < b * c"
   apply (cut_tac m = q and n = c in mod_less_divisor)
   apply (drule_tac [2] m = "q mod c" in less_imp_Suc_add, auto)