[seqfan] Re: True (?) reordering

[Maximilian Hasler]

naïvely, I would consider "reordering" as synonym for "bijection",
and would even accept the identity map as reordering
(unless additionally given restrictions exclude it, of course).

I don't know if there is a special name for the property you give,
I often see it explicitely worded as "without a fixed point".

M.

On Fri, Mar 5, 2010 at 5:10 PM, Eric Angelini <Eric.Angelini at kntv.be> wrote:
>
> Hello SeqFans,
>
> when one reads in the OEIS something like:
> "A reordering of the natural numbers", does
> this mean that we never have n = a(n) in
> the reordered sequence? If not, is there a
> name/concept for that?
>
> Best,
> É.
>