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1 − 2 + 3 − 4 + ··· = 
Abel summation works for this divergent series and result is 1/4 
In 1749 Euler extended the meaning of "sum" reaching very similar ideas
(btw, my first math video 
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@InertialObservr @panlepan @johncarlosbaez @GloriaVazquez_ @gaussianospic.twitter.com/4IHoMfVAvr
Neat idea but maybe include the definition of Abel summability
Absolutely. Next time I'll go for a bit of introduction 
For those asking, some starting points here: https://en.wikipedia.org/wiki/1_ −_2_+_3_−_4_+_⋯#Abel_summation
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