Update README.md

Author: weijie-chen

README.md

@@ -13,7 +13,7 @@ The lectures notes are loosely based on several textbooks:
 
 ![cover-min](https://user-images.githubusercontent.com/59842360/83939172-64df6c00-a7e3-11ea-80b1-058af696d5a3.png)
 
-However, the crux of the course is not about proving theorems, but to demonstrate the practices and visualization of the concepts. Thus we will not engage in strictly precise deduction or notation, rather we aim to clarify the elusive concepts and thanks to Python/MATLAB, the task is much easier now.
+However, the crux of the course is not about proving theorems, but to demonstrate the practices and visualization of the concepts. Thus we will not engage in precise deduction or notation, rather we aim to clarify the elusive concepts and thanks to Python/MATLAB, the task is much easier now.
 
 ## Prerequisites
 Though the lectures are for beginners, it is beneficial that attendants had certain amount of exposure to linear algebra and calculus.