[seqfan] Re: True (?) reordering

Joerg Arndt arndt at jjj.de
Tue Mar 9 08:59:10 CET 2010


Neat!

 (even...) -> 8 -> 6 -> 4 -> 2 -> 1 -> 3 -> 7 -> 9 -> (odd...)

My conceptual problem here was/is to accept
  (infinite odd) -> (infinite even)
as I stick to the rule "infinity is not a number".

I'll make an exception here  8-)


* franktaw at netscape.net <franktaw at netscape.net> [Mar 08. 2010 08:03]:
> Yes, of course it can.  See, for example, 
> http://www.research.att.com/~njas/sequences/A065168, which consists of 
> a single, infinite cycle.
> 
> Franklin T. Adams-Watters
> 
> -----Original Message-----
> From: Joerg Arndt <arndt at jjj.de>
> ...
> 
> Regarding cycles:
> can a permutation of the naturals have an
> infinite cycle (my guess: no)?
> 
> 
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