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-rw-r--r--plugins/fourier/Fourier_util.v4
1 files changed, 2 insertions, 2 deletions
diff --git a/plugins/fourier/Fourier_util.v b/plugins/fourier/Fourier_util.v
index b10c304c87..3ab7ad84a8 100644
--- a/plugins/fourier/Fourier_util.v
+++ b/plugins/fourier/Fourier_util.v
@@ -164,7 +164,7 @@ Qed.
Lemma Rnot_lt_lt : forall x y:R, ~ 0 < y - x -> ~ x < y.
unfold not; intros.
apply H.
-apply Rplus_lt_reg_r with x.
+apply Rplus_lt_reg_l with x.
replace (x + 0) with x.
replace (x + (y - x)) with y.
try exact H0.
@@ -177,7 +177,7 @@ unfold not; intros.
apply H.
case H0; intros.
left.
-apply Rplus_lt_reg_r with x.
+apply Rplus_lt_reg_l with x.
replace (x + 0) with x.
replace (x + (y - x)) with y.
try exact H1.