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Chapter 4: The windmill trick
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Why Was This Visual Proof Missed for 400 Years? - Fermat's Two Square Theorem
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- 1 Intro
- 2 Chapter 1: Discovering a theorem
- 3 Chapter 2: 400 years worth of proofs
- 4 Chapter 3: Zagier's one-sentence proof
- 5 Chapter 4: The windmill trick
- 6 Chapter 5: Windmill maths interlude
- 7 Chapter 6: Uniqueness !!
- 8 Credits
- 9 . Later on I also present a proof that there is only one way to write 4k+1 primes as the sum of two squares of positive integers.
