Re: Experimental`$EqualTolerance
- To: mathgroup at smc.vnet.net
- Subject: [mg105396] Re: Experimental`$EqualTolerance
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Tue, 1 Dec 2009 04:13:36 -0500 (EST)
- References: <968DB74B-05EC-42BA-9FF6-09B99B556FDE@mimuw.edu.pl>
O.K. I noticed my mistake. The functions do not exist in the
Experimental context in Mathemaica 7.01 - what happened was that I
created them by trying to check if they existed! That's an old trap that
I have not fallen into for many years ;-)
So it only leaves the question: it the old functionality still available
in some way?
Andrzej Kozlowski
On 1 Dec 2009, at 11:07, Andrzej Kozlowski wrote:
> The functions $EqualTolerance and $SameQToleranceexists in the
Experimantel context both in Mathematica 5.2 and in later versions. But
while in 5.2 I get
>
> In[1]:=
> Experimental`$EqualTolerance
>
> Out[1]=
> 2.10721
>
> In 7.01 I get:
>
> In[44]:= Experimental`$EqualTolerance
>
> Out[44]= Experimental`$EqualTolerance
>
> Further more, it seems that although the function name $EqualTolerance
has been retained in the Experimental context, the function itself no
longer does anything. Compare:
>
> Mathematica 5.2
>
> In[9]:=
> Block[{Experimental`$EqualTolerance =16}, 1. == 2.]
>
> Out[9]=
> True
>
> Mathematica 7.01
>
> In[58]:= Block[{Experimental`$EqualTolerance = 16}, 1. == 2.]
>
> Out[58]= False
>
>
> Was keeping Experimental`$EqualTolerance while removing its definition
in Mathematica 7 just an oversight or does it still serve some purpose?
And has the functionality been transferred to some other function?
>
> Andrzej Kozlowski
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