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Introduction to Projective Geometry via Tic-Tac-Toe Grids

Sum and Product 57,005 lượt xem 2 years ago
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My entry for @3blue1brown's Summer of Math Exposition 2022.

It's my first video ever and there are a million things I would like to improve. Mostly the audio quality and my terrible, terrible accent. 😅
Alas, perfect is the enemy of the good, isn't it. So, here we go.

#SoME2

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Animations were made with CindyJS:
https://cindyjs.org/

For more information on Projective Geometry, I recommend the book Perspectives in Projective Geometry by Jürgen Richter-Gebert:
https://link.springer.com/book/10.1007/978-3-642-17286-1

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Chapters:
[00:00] Opening
[00:40] Introduction
[01:48] Projective Transformations
[04:10] Incidence Construction
[06:55] The Cross-Ratio
[16:33] The “School” Method
[19:33] Epilogue

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