Looks like the result is: chisigma 1, Wikipedia 0.
Informations about Diriclet series can be found, among other sources, here...
Dirichlet series - Wikipedia, the free encyclopedia
The 'formal definition' of a Diriclet series is given as...
(1)
My problem of undestanding is when I try to compute the from (1). In the 'manual of mathematic' at my disposal is written...
(2)
... and setting , the (2) becomes...
(3)
... so that it would be...
(4)
My problem is that in Wikipedia is written...
(5)
The question is easy: which is correct?... (4) or (5)? ...
Thank in advance!...
Kind regards