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MathGroup Archive 2001

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Re: Problem with funktion with four variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31655] Re: Problem with funktion with four variables
  • From: gah at math.umd.edu (Garry Helzer)
  • Date: Fri, 23 Nov 2001 05:46:27 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

The pattern in the first argument doesn't mean what you think it does. Try 
FullForm on it and you will see. It means vsub0 times anything, but 14 is
not vsub0 times something. Just use v0_ (no subscript).


In article <9t86er$r6n$1 at smc.vnet.net>, Manuel Prinz
<manuel.prinz at t-online.de> wrote:

> Hello Guys
> 
> If I define this 
> 
> \!\(test[\(v\_0\) _, \ \[Gamma]_, \ H_, \ 
>       m_] :=
> \((\(\(-m\)*H\)\/\[Gamma]\^2*Cosh[ArcSinh[v\_0*\[Gamma]\/H]] - 
>         m\/\[Gamma]*ArcSinh[v\_0*\[Gamma]\/H]*v\_0)\)\)
> 
> and then try to calculate test[14,500,100,80] nothing happens!
> 
> What could be the problem?
> 
> 
> Thanks!
> 
> 
> Manuel (Mathematica 4.0)


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