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MathGroup Archive 2006

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Re: problem with constants

  • To: mathgroup at smc.vnet.net
  • Subject: [mg64137] Re: problem with constants
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Thu, 2 Feb 2006 00:06:38 -0500 (EST)
  • Organization: The Open University, Milton Keynes, UK
  • References: <drn068$kah$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Paul wrote:
> Hello!
> I`m using mathematica 5.0.0.0
> The following error occurred: instead of assigning a constant (e.g.
> after using DSolve) with C[1] and so on, the program is using K$...
> (... stands for a number)
> Do you know the reason?
> 
> Thanks!
> Paul
> 
Hi Paul,

"Solutions given by DSolve sometimes include integrals that cannot be 
carried out explicitly by Integrate. Dummy variables with local names 
are used in such integrals
(http://documents.wolfram.com/mathematica/functions/DSolve)."

Also, look at the example given in input In[7] below the text line 
reading "Here is the solution for a more general Abel-type equation. K$ 
variables are used as dummy integration variables 
(http://documents.wolfram.com/mathematica/Built-inFunctions/AlgebraicComputation/EquationSolving/FurtherExamples/DSolve.html)."

Best regards,
/J.M.


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