a spectacular solution to the Basel problem (sum of 1/n^2 via a complex integral)
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i-th root of i
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But HOW did Euler do it?! A BEAUTIFUL Solution to the FAMOUS Basel Problem!
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an A5 Putnam Exam integral for calc 2 students
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Euler's real identity NOT e to the i pi = -1
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so you want a VERY HARD math question?!
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Why is pi here? And why is it squared? A geometric answer to the Basel problem
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If I did this in 1734 I'd be World Famous
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