Uploaded September 2020 | Updated September 2026, 1 week ago

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Gauss's Lemma: youtu.be/JhbSYWA0COU

Quadratic reciprocity is one of the most important results in elementary number theory when it comes to computing Legendre symbols. To prove it, we use a proof based on Gauss's lemma and Euler's criterion!

Quadratic Residues playlist: youtube.com/playlist?list=PLug5ZIRrShJGJieICD2KnqU9cRioaEBjB

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Music: C418 - Pr Department