# Re: Sum of all natural numbers = -1/12?

```Amazing.

That means that there are much left to discover in math.```
```
And also note that:

1/12 = 2/24  and 24= flip 42 for some well known flip : N -> N

;)

2014/1/18, Bruno Marchal <marc...@ulb.ac.be>:
> Alberto,
>
> What is amusing is that Ramanujan said this (that 1+2+3+... = -1/12)
> in a letter to find a job in England, just to illustrate that he was
> not bad in computing. He was of course considered as crackpot until
> the letter was given to Hardy, who recognized immediately the genius.
> Another amazing thing is that in string theory, the computation of
> the mass of the photon leads to the expression 1/12 +
> (1+2+3+4+5+ ...). the physicists thought "shit, again an infinity",
> but were comforted by the number theorists, that on the complex
> numbers, this gives "somehow" the needed -1/12.
>
> Number theory is full of that kind of very surprising facts. of course
> the limit is not the usual limit of a series. We don't get that
> "infinity" = -1/12.
>
> Bruno
>
> http://iridia.ulb.ac.be/~marchal/
>
>
>
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--
Alberto.

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