[seqfan] Re: Please name this function.

[Neil Sloane]

The identity map!

On Sat, Sep 8, 2012 at 11:29 PM, Ed Jeffery <lejeffery7 at gmail.com> wrote:

> I know this is the wrong place to ask the following, so I apologize, but I
> have been searching for many days and cannot find the answer:
>
> What is the name of a function that is both additive and multiplicative but
> not arithmetic (in the sense that x and y are usually not integers), such
> that
>
> f(x+y) = f(x)+f(y)
>
> and
>
> f(x*y) = f(x)*f(y)?
>
> Thanks in advance.
>
> LEJ
>
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Dear Friends, I have now retired from AT&T. New coordinates:

Neil J. A. Sloane, President, OEIS Foundation
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