Euler's four-square identity - Wikipedia
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Theorem - Wikiwand

Amazing visual explanation of Euler's Identity. Gauss said that if this identity was not immediately obvious, a person would never be a first class mathematician. I disagree, but this explanation makes it

I just disproved pythagorean theorem!!! It's false for 4,5,6 : r/mathmemes

Animation vs. Math, Animator vs. Animation Wiki

Euler's Formula - Complex Numbers, Polyhedra, Euler's Identity

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File:Euler's Formula c.png - Wikimedia Commons

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Lagrange's Four-Square Theorem -- from Wolfram MathWorld
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