diff --git a/docs/数学进阶/convex.en.md b/docs/数学进阶/convex.en.md
index 6e21e2de..1fd6eb50 100644
--- a/docs/数学进阶/convex.en.md
+++ b/docs/数学进阶/convex.en.md
@@ -14,11 +14,11 @@ In practice, you will deeply understand that for the same problem, a small chang
 
 ## Course Resources
 
-- Course Website: <http://stanford.edu/class/ee364a/index.html<http://stanford.edu/class/ee364a/index.html>
+- Course Website: <http://stanford.edu/class/ee364a/index.html>
 - Recordings: <https://www.youtube.com/watch?v=VNON98dKjno&list=PLoCMsyE1cvdXeoqd1hGaMBsCAQQ6otUtO>
 - Textbook: [Convex Optimization](https://stanford.edu/~boyd/cvxbook/)
 - Assignments: refer to the course website
 
 ## Personal Resources
 
-All the resources and assignments used by @PKUFlyingPig in this course are maintained in [PKUFlyingPic/Standford_CVX101 - GitHub](https://github.com/PKUFlyingPig/Standford_CVX101)
\ No newline at end of file
+All the resources and assignments used by @PKUFlyingPig in this course are maintained in [PKUFlyingPic/Standford_CVX101 - GitHub](https://github.com/PKUFlyingPig/Standford_CVX101)