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From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: polynomial factorization
Date: Sat, 23 Feb 2008 01:10:20 +0000 (UTC)
Organization: John D'Errico (1-3LEW5R)
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Arthur G <gorramfreak@gmail.com> wrote in message <7d356194-01f0-
472f-93d1-04bdad5a1e64@60g2000hsy.googlegroups.com>...
> On Feb 22, 6:05=A0pm, "Dejun Wang" <dejunw...@yahoo.com> wrote:
> > Hi, I have a polynomial in the following form:
> > H(z)=3D[z^4+a3*z^3+a2*z^2+a1*z+a0]/
> > [z^5+b4*z^4+b3*z^3+b2*z^2+b1*z+b0], where a3-a0,b4-b0 are
> > known.
> > I want to obtain a factorized polynomial in the form of
> > H(z)=3DA/(z-p0)+B/(z-p1)+C/(z-p2)+D/(z-p3)+E/(z-p4), I know
> > I can use roots to get p0-p5, but is there a function that
> > I can use to get the value of A,B,C,D,E? Or do I need to
> > create my own symbolic equations to solve this?
> >
> > Thanks.
> 
> residue is the function you want.

But don't expect success. No matter what,
it will need to factor a symbolic polynomial
of the 5th degree with symbolic coefficients.

Its not gonna work.

John