diff --git a/docs/数学进阶/numerical.en.md b/docs/数学进阶/numerical.en.md
index eed26c9e..3286034d 100644
--- a/docs/数学进阶/numerical.en.md
+++ b/docs/数学进阶/numerical.en.md
@@ -3,7 +3,7 @@
 ## Descriptions
 
 - Offered by: MIT
-- Prerequisites:,, Calculus, Linear Algebra, Probability theory
+- Prerequisites:Calculus, Linear Algebra, Probability theory
 - Programming Languages: Julia
 - Difficulty: 🌟🌟🌟🌟🌟
 - Class Hour: 150 hours
@@ -22,4 +22,4 @@ The designers of this course have also written a companion open source textbook
 
 ## Personal Resources
 
-All the resources and assignments used by @PKUFlyingPig in this course are maintained in [PKUFlyingPic/MIT18.330 - GitHub](https://github.com/PKUFlyingPig/MIT18.330)
\ No newline at end of file
+All the resources and assignments used by @PKUFlyingPig in this course are maintained in [PKUFlyingPic/MIT18.330 - GitHub](https://github.com/PKUFlyingPig/MIT18.330)