In our sequence and series class, my teacher wrote this series and asked if it makes any sense. We all were saying "this makes no sense at all." But when I Googled it, the whole world knows it. So what exactly this series define? Some say string theory uses this series. Can someone explain it?
2026-03-25 11:24:34.1774437874
$1+2+3+4+5+\dotsb =\frac{-1}{12}$ Is this true in real domain? Can you tell where this series is used?
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