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Re: Comparison of coefficients

  • To: mathgroup at smc.vnet.net
  • Subject: [mg91813] Re: Comparison of coefficients
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Tue, 9 Sep 2008 06:55:02 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <ga2pq1$p93$1@smc.vnet.net>

Kay-Michael Voit wrote:

> I'm trying to solve a PDE using a Exp ansatz.
> Now I am am stuck with the equation of the form
> a Exp[I k x] + b Exp[I k x] == 0 (though much more complicated)
> What I would like to do is a comparison of coefficients. How can I make
> Mathemetica to show me a form of the equation where I can easily read
> the comparison equations?
> (In the above equation
> (a + b) Exp[I k x] == 0
> for example.)

You could use *Factor* as in

     In[1]:= a Exp[I k x] + b Exp[I k x] == 0 // Factor

     Out[1]= (a + b) E^(I k x) == 0

Regards,
-- Jean-Marc


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