Kevin Buzzard on Thu, 14 Sep 2017 21:56:21 +0200


[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: eulerphi(0)


The number of units in Z/(0) is 2 ;-)

Kevin

On 14 September 2017 at 20:46, Max Alekseyev <maxale@gmail.com> wrote:
> Is there any particular reason behind eulerphi(0) = 2 ?
>
> ? eulerphi(0)
> %1 = 2
>
> I'd rather expect eulerphi(0) to result in an error.
> Zero value would also make more sense, since there are no positive integers
> <=0 (even if we do not care about co-primality).
>
> Regards,
> Max