diff --git a/01.curriculum/02.mathematic/01.niv1/topic.en.md b/01.curriculum/02.mathematic/01.niv1/topic.en.md
index 92821f531..c645dea5b 100644
--- a/01.curriculum/02.mathematic/01.niv1/topic.en.md
+++ b/01.curriculum/02.mathematic/01.niv1/topic.en.md
@@ -1,5 +1,5 @@
 ---
-title: ' plains'
+title: plains
 published: true
 routable: false
 visible: false