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.`

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`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/ -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.