MathGroup Archive 2000

[Date Index] [Thread Index] [Author Index]

Search the Archive

Sorting with Infinity

  • To: mathgroup at
  • Subject: [mg23513] Sorting with Infinity
  • From: Jack Goldberg <jackgold at>
  • Date: Tue, 16 May 2000 02:44:59 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Hi group;

I construct lists which may look like this


When this list is sorted by using Sort, I get


I would prefer, naturally, 


This is easy to do if one doesn't care about elegance.  Without 
spelling out the obvious details, here are a few kludges:

(1) Replace Infinity by 10^15, Sort  then switch back to Infinity.
(2) Use Append and Prepend after Sort and  deleting infinities.
(3) RotateRight after Sort and switch signs on infinities

Anyone got a "cute" solution say by using a sorting function or 
perhaps some arcane command unknown to mere mortals? 



  • Prev by Date: Parametric Solving Question From 14 Year Old
  • Next by Date: Re: [Help me] Start Up Error
  • Previous by thread: RE: Re: Parametric Solving Question From 14 Year Old
  • Next by thread: Re: Sorting with Infinity