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MathGroup Archive 2007

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How to choose real positive solutions only?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg74301] How to choose real positive solutions only?
  • From: "Dix, Manfredo A " <mdix at tulane.edu>
  • Date: Sun, 18 Mar 2007 00:41:29 -0500 (EST)

Hello,
this question probably came up before, but anyway:

suppose I have a system of 3 equations and 3 unknowns,
which I want to solve numerically with NSolve.
They are polynomial of degree "n" so that I get n solutions.

Is there a way to tell Mathematica to just return the
real positive solutions, and dismiss the imaginary and negative
ones?

thank you so much for any help,
cordially,

Manfred
mdix at tulane.edu



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