Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1998
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1998

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

Search the Archive

Re: simplifying complex polynomials

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13771] Re: simplifying complex polynomials
  • From: Wouter Meeussen <eu000949 at pophost.eunet.be>
  • Date: Mon, 24 Aug 1998 05:07:20 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Daniel,

lets create a sum of terms:

fa:=Apply[Plus,Table[(-1)^Random[Integer,{0,1}]
y@@Table[Random[Integer,{-1, 1}],{3}] ,{36},{4}],1]

ad let's make a rule:
ruletwo=(  a_Plus /;!MatchQ[(Plus@@(a/. -q->q/.Plus->List/.
y->List)),{2,_,_}]
  ->{})
let's create a sample:

fa
(#/.ruletwo&)/@%
%~DeleteCases~{}

this gives the list fa cleaned up.

wouter


At 04:39 15-08-98 -0400, Daniel H. Steinberg wrote:
>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.
>



  • Prev by Date: Importing CSV (comma separated values) files?
  • Next by Date: Re: a^n*b^n != (a*b)^n
  • Previous by thread: Re: simplifying complex polynomials
  • Next by thread: Fourier Transform