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Re: Bug Report - Two numerical values for a same variable

• To: mathgroup at smc.vnet.net
• Subject: [mg54422] Re: Bug Report - Two numerical values for a same variable
• From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
• Date: Sun, 20 Feb 2005 00:09:23 -0500 (EST)
• References: <00ed01c512b0$2f242850$6400a8c0@Main> <curpbn$r28$1@smc.vnet.net> <200502150438.XAA29728@smc.vnet.net> <200502161936.OAA19223@smc.vnet.net> <bc260b75189ab899a75c3a5c65dc0bcf@gmail.com> <4214B60F.2050207@math.umass.edu> <7264774360d595ba92f3e713df810465@mimuw.edu.pl> <cv6ru9$6jj$1@smc.vnet.net> <42177C45.5090205@cs.berkeley.edu>
• Sender: owner-wri-mathgroup at wolfram.com

On 19 Feb 2005, at 18:49, Richard Fateman wrote:

>
> The fact that these are stand-ins for well-known mathematically real
> quantities is irrelevant to Mathematica, since it only understands Real,
> and Real is a subset of mathematical real.
>

This is simply untrue in modern versions of Mathematica:

In[4]:=
Element[Pi,Reals]

Out[4]=
True

and so on. Mathematica certianly undersands Reals, it is just that Real 
an Reals, Complex and Complexes, Rational and Rationals play different 
roles. The former are somewhat akin to types in other languages and are 
usued basically for programming the latter are used for mathematics. I 
find it perfectly satisfactory, knowing your opinions I am sure you 
don't but that is all this amounts to and nothing one can argue about.


Andrzej Kozlowski

• References:
  • Re: Bug Report - Two numerical values for a same variable
    • From: Scott Hemphill <hemphill@hemphills.net>
  • Re: Re: Bug Report - Two numerical values for a same variable
    • From: Murray Eisenberg <murray@math.umass.edu>