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Re: Converting Power terms to Times terms

  • To: mathgroup at smc.vnet.net
  • Subject: [mg88036] Re: Converting Power terms to Times terms
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 22 Apr 2008 06:29:48 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <fuin2e$9o8$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

no, but you can redefine the output of Power[], so that it
look like a*a*a, i.e.

Unprotect[Power]
Format[Power[a_, n_Integer],
   FortranForm] := (HoldForm @@ {Table[a, {n}]}) /. List -> Times

Protect[Power]

and

FortranForm[a*b^4*Sin[w^2]]

gives

a*(b*b*b*b)*Sin(w*w)


Regards
   Jens

Reza Farrahi Moghaddam wrote:
> Hello,
>  
> I am using Dolfin/FFC for solving finite element problems. I want to use Mathematica for generating the linear and bilinear terms of the weak equation. After computing the terms, I use the "InputForm", and then give the results to FFC compiler. The problem is that FFC does not accept "power" function. Therefore, terms such as "a^2" must be written as "a*a". Because there are many terms in the weak form of my problem, manual conversion of power terms takes a long time (and probably is subject to errors).
>  
> Is there any way to disable "power" function, or stop "times" function to be simplified in the "power" form?
>  
> Any other solution?
>  
> Thanks,
> Reza
> 
> 


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