Chinese Remainder Theorem Background Story: back in the Han dynasty, there is a famous General Han Xin. In order to prevent the spy in the army to detect the number of his soldiers, he used an advanced Counting System (韩信点兵). Instead off directly counting from 1 to n, he asked his soldiers to number off from 3 times. First time 1…

# Category: Mini Math Note

## Mini algebra 1

Abstract Algebra is my favorite Math categories; it totally opened a new world for me. 2+2 is not necessarily equal to 4 anymore; we could not take a+b = b+ a for grant ; logos or pictures have mathematical meaning presentations….. The foundation of Contemporary Algebra is built on the concept of Group. Some math genius got so bored so they started…