# Cauldron of Numbers MathPots

### 0.999….is equal to 1 or not?

0.9999…=1? This question shows up every year. It's a 0.9999…=1 anniversary, right? Today MathPots also want to try to cook this stuff to everyone.

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### [calculus]The example of ε-δ definition problem

In the last meal [calculus]The clarification of ε-δ definition, we knew the actual meaning of $latex \varepsilon -\delta$ definition. This time we are going to use it. In this dish, I will show you the basic problem in $latex \varepsilon -\delta$ definition. Hope to make you understand clearly!

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### What is Thales' theorem? The little relationship between circle and right triangle.

Maybe some people would say that “who is Thales? I have only heard about T

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### [calculus]The clarification of ε-δ definition

I believe that you learned the simple concepts of limit, integral and differenti

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### Three Doors Problem-Monty Hall Problem in the Movie 21

“Suppose you are in a game show, and you are given a chance to choose three different door. Now behind one of the doors is a new car, and behind the other two are goats. Which door would you choose?”
In the movie 21, Professor Mickey asked a question in his class. The play of the talk between Mickey and Ben impressed a lot of people. In fact, the question in the movie is a classic question – Monty Hall problem! Let’s take a look!

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### Hilbert's paradox of the Grand Hotel-Welcome to the Hilbert's hotel!

Welcome to the Hilbert's Hotel! This is a hotel in Hilbert's imagination. There are infinite rooms and infinite customers. No matter how many guests, you have to set enough rooms to let them move in. Are you ready to be a manager?

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### 0.999….is equal to 1 or not?

0.9999…=1? This question shows up every year. It's a 0.9999…=1 anniversary, right? Today MathPots also want to try to cook this stuff to everyone.

Savor »

### [calculus]The example of ε-δ definition problem

In the last meal [calculus]The clarification of ε-δ definition, we knew the actual meaning of $latex \varepsilon -\delta$ definition. This time we are going to use it. In this dish, I will show you the basic problem in $latex \varepsilon -\delta$ definition. Hope to make you understand clearly!

Savor »
Elementary

### What is Thales' theorem? The little relationship between circle and right triangle.

Maybe some people would s

Savor »

### [calculus]The clarification of ε-δ definition

I believe that you learne

Savor »

### Three Doors Problem-Monty Hall Problem in the Movie 21

“Suppose you are in a game show, and you are given a chance to choose three different door. Now behind one of the doors is a new car, and behind the other two are goats. Which door would you choose?”
In the movie 21, Professor Mickey asked a question in his class. The play of the talk between Mickey and Ben impressed a lot of people. In fact, the question in the movie is a classic question – Monty Hall problem! Let’s take a look!

Savor »

### Hilbert's paradox of the Grand Hotel-Welcome to the Hilbert's hotel!

Welcome to the Hilbert's Hotel! This is a hotel in Hilbert's imagination. There are infinite rooms and infinite customers. No matter how many guests, you have to set enough rooms to let them move in. Are you ready to be a manager?

Savor »

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