Cauchy's Proof of the Basel Problem | Pi Squared Over Six (3blue1brown SoME1 Entry)
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The Basel Problem
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Euler's real identity NOT e to the i pi = -1
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The Wallis product for pi, proved geometrically
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The Mathematician Forced to Become a Genius
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a spectacular solution to the Basel problem (sum of 1/n^2 via a complex integral)
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A 1.58-Dimensional Object - Numberphile
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But HOW did Euler do it?! A BEAUTIFUL Solution to the FAMOUS Basel Problem!
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