Monday, August 28, 2017

real analysis - Proof for suminftyn=1frac1n2=fracpi26 without complexes?





This is what I needed. Practically, a link were also okay.



n=11n2=π26


Answer



Evaluating ζ(2) by Robin Chapman contains several proofs (~14 altogether). You can have a look through and find a nice one.


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