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MathGroup Archive 2005

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Re: how to have a blind factorization of a polinomial?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54081] Re: how to have a blind factorization of a polinomial?
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 10 Feb 2005 02:46:14 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <cud789$2t3$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

Sqrt[x + y] /. a_ + x :> x*(a/x + 1)

??

Regards

  Jens

"foice" <NONfoiceSPAMMARE at tiscalinet.it> schrieb im Newsbeitrag 
news:cud789$2t3$1 at smc.vnet.net...
> i'd like to have a "froced" or "blind" factorization of an expression so 
> pass
>
> from
> Sqrt[x+y]
>
> to
> Sqrt[x(1+x/y)]
>
> and similar.
> This kind of operation is very usefull when you need to judge the relative 
> wight of
> various term in a polinomial in order to make wise approximations into 
> algebra
> manipulations of your physical problem.
>
> But how can I get such very simple algebric operation into Mathematica?
>
> Thanks
> Roberto
>
> -------------------------------------------------------------
> tutto ciò che ho scritto è sempre In My Humble Opinion (IMHO)
> probabilmente l'ho scritto di fretta, quindi scusate se sono stato 
> sbrigativo.
> 



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