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-rw-r--r--theories/Reals/Rfunctions.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/theories/Reals/Rfunctions.v b/theories/Reals/Rfunctions.v
index 525eff688..1eee8d852 100644
--- a/theories/Reals/Rfunctions.v
+++ b/theories/Reals/Rfunctions.v
@@ -659,7 +659,7 @@ Definition decimal_exp (r:R) (z:Z) : R := (r * 10 ^Z z).
(** * Sum of n first naturals *)
(*******************************)
(*********)
-Boxed Fixpoint sum_nat_f_O (f:nat -> nat) (n:nat) : nat :=
+Fixpoint sum_nat_f_O (f:nat -> nat) (n:nat) : nat :=
match n with
| O => f 0%nat
| S n' => (sum_nat_f_O f n' + f (S n'))%nat