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MathGroup Archive 2007

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Re: Sort with -Infinity fails

  • To: mathgroup at smc.vnet.net
  • Subject: [mg73887] Re: Sort with -Infinity fails
  • From: dh <dh at metrohm.ch>
  • Date: Fri, 2 Mar 2007 06:45:35 -0500 (EST)
  • References: <es6d0l$rmr$1@smc.vnet.net>


Hi Tom,

astonishingly the following gives the correct sorted list:

Sort[{-Infinity,-8,5},#1<#2&]

Daniel



Tom Aldenberg wrote:

> Dear MathGroup,

> 

> Minus Infinity (-Infinity) is smaller than -8, but Sort does not sort it as

> expected.

> Is there a Real minus Infinity?

> 

> 

> In[75]:=

>       -Infinity < -8

> Out[75]=

>       True

> 

> In[76]:=

>       Sort[{-Infinity, -8, 5}]

> Out[76]=

>       {-8, 5, -∞}

> 

> 

> Regards,

> 

> Tom Aldenberg

> 

> ____________________________________________________________________________

> 

> DISCLAIMER:  http://www.rivm.nl/disclaimer.htm

> 

> 




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