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MathGroup Archive 2006

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Re: Pattern Matching for Exponentials

  • To: mathgroup at
  • Subject: [mg67506] Re: [mg67502] Pattern Matching for Exponentials
  • From: Bob Hanlon <hanlonr at>
  • Date: Thu, 29 Jun 2006 00:09:04 -0400 (EDT)
  • Reply-to: hanlonr at
  • Sender: owner-wri-mathgroup at

If a pattern does not work on an expression, look at the FullForm for the expression to see if the form is what you think it is.



Exp[2*I*t] /. 


Bob Hanlon

---- Rick Eller <reller at> wrote: 
> I am looking for a pattern-matching replacement rule which will 
> transform exponential functions of the form exp(n i t) into 
> (1/(n^2-1))exp(n i t) where i = sqrt[-1]. For example, exp(2 i t) 
> should convert to (1/3)exp(2 i t). I've tried the following code without 
> success :
> In:     Exp[2 i t]   /.  Exp[n_ i t] -> Exp[n i t]/(n^2-1)
> Out:  e^2 i t
> I would appreciate any suggestions as to how this code should be 
> modified.
> Thanks,
> Rick Eller

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