Services & ResourcesWolfram ForumsMathGroup Archive

[Date Index] [Thread Index] [Author Index]

Re: Removing constant multiples from polynomials

• To: mathgroup at smc.vnet.net
• Subject: [mg73437] Re: [mg73383] Removing constant multiples from polynomials
• From: Adriano Pascoletti <pascolet at dimi.uniud.it>
• Date: Fri, 16 Feb 2007 01:04:44 -0500 (EST)
• References: <200702150955.EAA04553@smc.vnet.net>

Coefficient[poly, x*y,1] returns the coefficient of x*y in poly, so

In[1]:=
(#1/Coefficient[#1, x*y, 1] & )[1276*(x - 1)*((y - 2)/397)]

Out[1]=
(-1 + x)*(-2 + y)

should solve your problem.
Adriano Pascoletti


On 15 feb 2007, at 10:55, Azumanga wrote:

> I am working on an algorithm which manipulates sets of polynomials.
> Often it produces (after an application of FullSimplify) polynomials
> like:
>
> 1276(x-1)(y-2)/397
>
> I'm only interested in the solutions to the polynomial, so to me this
> is "equivalent" to:
>
> (x-1)(y-2)
>
> As a short-term solution I call "GroebnerBasis" on the single
> polynomial, which seems to perform this simplification. However is
> there a simpler method?
>
> Thank you,
>
> Chris
>
>

• References:
  • Removing constant multiples from polynomials
    • From: "Azumanga" <4zumanga@gmail.com>