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MathGroup Archive 2002

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Re: How to separate imaginary unit inside an arbitrary function?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg32457] Re: How to separate imaginary unit inside an arbitrary function?
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 22 Jan 2002 03:19:20 -0500 (EST)
  • Organization: Universitaet Leipzig
  • References: <a2gi3d$ks$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

5*I is a single complex number ! and not Times[5,Complex[0,1]] it is
Complex[0,5]. 

Regards
  Jens

Kostya wrote:
> 
> Dear all
> 
> Have a simple problem:
> have a function, say
> Name[5*I*a] but want to break it into multiples:
> Name[5*I*a]->Name[5]*Name[I]*Name[a]
> 
> The issue is that the standard :> rule does not work properly:
> Name[5*I*a]//.{Name_[exa_*exb_]:>(Name[exa]*Name[exb]),
> Name_[exa_*exb_*exc_]:>(Name[exa]*Name[exb]*Name[exc])}
> 
> yields just:
> Name[5*I]*Name[a] instead of desired "Name[5]*Name[I]*Name[a]"
> 
> any suggestions?
> 
> with regards
> Kostya


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