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MathGroup Archive 1998

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simplifying complex polynomials

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13699] simplifying complex polynomials
  • From: dhs6 at po.cwru.edu (Daniel H. Steinberg)
  • Date: Sat, 15 Aug 1998 04:39:28 -0400
  • Organization: Case Western Reserve University, Cleveland OH (USA)
  • Sender: owner-wri-mathgroup at wolfram.com

A friend of mine is trying to simplify polynomials which are sums of
monomials each of which is the product of terms which are y_[] and z_[]
where the [] is a vector like [1,1,2,1,5].

Her simplification rules are fairly straightforward -- but how do you
get Mathematica to do it.

Rule 1: Each monomial must be quadratic in z (i.e. if it's not, replace
it by 0)

Rule 2: Each monomial's vector subscripts must sum (over all z's and
y's) to the vector [1,2,2,2,1]  (for example). If it doesn't the term
can be eliminated.

Any thoughts? She's trying to process it as a list but this seems to be
further complicated by multiplicities.

Thanks, Daniel


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