updated prerequisities

Author: pevnak

docs/src/index.md

@@ -85,13 +85,8 @@ the standard grading scale below.
 ## Prerequisites
 
 There are no hard requirements to take the course, but if you are not at all familiar
-with Julia we recommend to take
-[Julia for Optimization and Learning](https://github.com/JuliaTeachingCTU/Julia-for-Optimization-and-Learning)
-before enrolling in this course.
-
-The [Functional Programming](https://cw.fel.cvut.cz/b202/courses/fup/start) course also contains
-some helpful concepts for this course.
-
+with Julia we recommend you to take [Julia for Optimization and Learning](https://github.com/JuliaTeachingCTU/Julia-for-Optimization-and-Learning) before enrolling in this course. The [Functional Programming](https://cw.fel.cvut.cz/b202/courses/fup/start) course also contains
+some helpful concepts for this course. And knowledge about computer hardware, namely basics of how CPU works, how it interacts with memory through caches, and basics of multi-threadding certainly helps.
 
 ## References