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MathGroup Archive 2005

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Re: Removed[$$Failure] in Integrate

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61963] Re: [mg61928] Removed[$$Failure] in Integrate
  • From: Pratik Desai <pdesai1 at umbc.edu>
  • Date: Sun, 6 Nov 2005 05:11:40 -0500 (EST)
  • References: <200511050652.BAA01952@smc.vnet.net> <4E83B469-8FE3-4453-B393-0E1C4400CAFD@mimuw.edu.pl>
  • Sender: owner-wri-mathgroup at wolfram.com

Andrzej Kozlowski wrote:

>
> On 5 Nov 2005, at 15:52, Pratik Desai wrote:
>
>> Hi folks
>>
>> Has any body come across this while using Integrate
>>
>>  Removed[$$Failure]
>>
>> What does this mean? Besides the obvious explanation
>>
>> Please advise
>>
>
> My question is: what is "the obvious explanation"?

That it  is a bug ;-)

>
> At the risk of being too obvious let me just give an example of the  
> way Removed[symbol] usually appears in Mathematica:
>
> In[1]:=
> dog=cat;
>
> In[2]:=
> Remove[cat]
>
> In[3]:=
> dog
>
> Out[3]=
> Removed[cat]
>
> Well, possibly some part of the code returned $$Failure, which was  
> then assigned to some variable and then Removed, leaving behind   
> Removed[$$Failure] . Most likely a bug.

Thanks Andrzej this is exactly what I was looking for. Using Integrate 
these days reminds me of a quotation by  Laplace
"Nature laughs at the difficulties of integration." :-)

>
>
> Andrzej Kozlowski
>
Best Regards,

Pratik

-- 
Pratik Desai
Graduate Student
UMBC
Department of Mechanical Engineering
Phone: 410 455 8134



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