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MathGroup Archive 2007

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Multivariate polynomial elimination question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74820] Multivariate polynomial elimination question
  • From: "Paul T" <paul.timmons at btinternet.com>
  • Date: Fri, 6 Apr 2007 04:24:49 -0400 (EDT)

I have a polynomial P[x,a,b] with rational coefficents of degree 15 in
x. It is quartic w.r.t. the variable a, and a cubic w.r.t. b^2. I wish
to recover the degree 60 and degree 90 (w.r.t. x) polynomials Q[x,b]
and R[x,a] by eliminating a and b^2 respectively. I've tried naively
using Eliminate[P==0,a] but this just returns TRUE. Is it possible to
do this by some other means?



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