Quote:
Originally Posted by Hamlet53
1+ 2 +3 + . . . some how sums to -1/12? Would you happen to have a link to that?
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http://en.wikipedia.org/wiki/Ramanujan_summation
Ramanujan Summation is a way to get a value for a divergent series, in a way that produces the 'correct' answer when applied to convergent series. At least, I think that's what it's doing. It not really a sum in terms of adding things up.