Sometimes, analytic continuation of some functions (like zeta) gives bizarre summation values for series like the one in the title or for 1+1+1+.... = -1/2 etc... and they are also used quite often in physics.(adsbygoogle = window.adsbygoogle || []).push({});

Are mathematicians really comfortable with such values for such series? Whats the general understanding about such appearance?

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# What to make out of series like 1+2+3+ = -1/12 ?

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