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MathGroup Archive 1997

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Simple Numerical analysis problem

  • To: mathgroup at
  • To: mathgroup at
  • Subject: [mg7636] Simple Numerical analysis problem
  • From: remi at
  • Date: Fri, 20 Jun 1997 16:16:09 -0400 (EDT)
  • Organization: Technion, Israel Institute of Technology
  • Sender: owner-wri-mathgroup at

I have a litle problem in solving a rather simple equation with

  Here are the lines in mathematica 
	x1 = 5;
	x2 = 7;
	U = (Sqrt[(1-pi0) x1] -1)^2;
	ro = (1+pi0 x2+U+Sqrt[(1+pi0 x2+U)^2-4 x2 pi0])/2;
	eq = x2 (1-ro)^2/ro +x2 U/ro - (ro - pi0 x2/ro)Sqrt[U x1/(1-pi0)]==0;
	NSolve[eq, pi0]

There mathematica cannot solve this equation and find the values of pi0
that solves the problem while mapleV find them to in 2 seconds, as I am
a beginner in mathematica I would be happy to get some help on this
problem, moreover is it possible to determine the domain in which the
solution has to be found while using the Solve or NSolve commnad??

 Remi Mennesson

 e-mail: remi at

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