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: Maths

## Collatz Conjecture

Python Day 4: Collatz Conjecture Some of the students used to ask me, why do we have to learn calculus? I told them because if they are good at calculus then they may good at abstract algebra and number theory, and eventually can be the front page of the People’s Magazine like Andrew Wiles. (Andrew Wiles proved Fermat’s Last Theorem).

## Derivative

Derivatives 1:

Derivative is one of my favorite concepts; it is the fundamental idea of calculus.

Derivative represents the rate of instantaneous change at the point a.

Math started to make sense to me systematically from calculus.

One application is

S(t): Distance

S'(t) = v(t) : velocity

S”(t)= v'(t)= a(t): accerlation

and dont forget S”'(t)= jerk 🙂

Happy studying!

## The Game of 31

Thirty-One: Last weekend, 77 recommended me to watch a TV shows, High Intelligent Players, 高能玩家. Among the games they played, there is a game of 31, I think it is very interesting.

## Fun Numbers

Python Day 3: Finding Fun Numbers All the maths fans know the story about 1729, the Ramanujan Number. One day Hardy visited Ramanujan in the hospital and said he took a taxi with a boring licence number, 1729. Ramanujan said: it is a very interesting number; it is the smallest number expressible as the sum of two cubes in two different ways.

## I-topology

#### Topology 1:

I never really understood any topology classes while in school, but I enjoyed all the fancy torus Dr.Bazeyach drew. I saw this picture from ins #math. I thought it is very cute 🙂

## 2019

Every number is interesting if we are willing to explore it!

## X-mas

Merry Christmas!

## THE MULLINEUX MAP AND p-REGULARIZATION FOR HOOK PARTITIONS

**To My Precious Abstract Algebra Days**

1000 Thanks to Dr. David Hemmer!

My favorite professor all time!

## SAS 11.11

In China, 11.11 is Single’s Day. I found this day very interesting, although 1111 looks like a solitude date on the calendar. It is not! It has a prime factorization 1111=101*11, and both 11 and 101 are primes. Therefore I think 1111 is a cute number and a Prime relationship day! Some people may be like Composite Numbers, always have…