A Mathematical Description of Doraemon's 4 Dimensional Pocket.

1. How Doraemon’s 4
Dimensional Pocket
Works?
Mathematics is Fun!

2. Motivation

3. Questions
• Why named 4-dimensional?
• Where the things go?
• How the things been so small?

4. Let’s Think of 2D World

5. Suppose you are in the
picture

6. But How the things can be
small enough?

7. Origami Theory
• Fold paper(2D) and makes 3D Object.
=> This process reduce the size of paper in
2D world.

8. Then, Get back to 3D world

9. Only Residents in 4D can
perceive
• Plotting the things in one place in 3D with
forth component free.
• folding 3D object into 4D.

10. Define Formulas

11. Then you realize
mechanism.

12. Anything can be explained
in mathematics.

13. Thank you!