[seqfan] Re: What was Euler's original notation for the totient function?

[Alonso Del Arte]

Thank you very much. I got such a feeling of deja vu reading that, that I
think that is precisely where I read it.

On Mon, Jun 7, 2010 at 9:30 PM, Robert Israel <israel at math.ubc.ca> wrote:

> This is mentioned in Dickson's "History of the Theory of Numbers".  See
> p. 128 of Lehmer's review of Dickson,
> <http://projecteuclid.org/euclid.bams/1183425137>.
>
> Robert Israel                                israel at math.ubc.ca
> Department of Mathematics        http://www.math.ubc.ca/~israel
> University of British Columbia            Vancouver, BC, Canada
>
> On Mon, 7 Jun 2010, Alonso Del Arte wrote:
>
> > I read somewhere that at first Euler notated his famous totient function
> as
> > pi(n) rather than phi(n). But now I can't remember what that book was.
> Maybe
> > it was a biography of Euler, but I haven't read many biographies from
> > beginning to end. Anyway, I would appreciate any book that says what
> Euler's
> > original notation was.
> >
> > Al
> >
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