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FindRoot cannot find obvious solution

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  • Subject: [mg47806] FindRoot cannot find obvious solution
  • From: "Mukhtar Bekkali" <mbekkali at>
  • Date: Tue, 27 Apr 2004 04:47:45 -0400 (EDT)
  • Organization: Iowa State University
  • Sender: owner-wri-mathgroup at

Here is my code in Mathematica 5:


The output is

NIntegrate::inum: Integrand H is not numerical at {x} = {0.5`}.
FindRoot::cvmit: Failed to converge to the requested accuracy or precision
within 100 iteration

and it gives me y->0.45 or the upper boundary. However, when I plot g[y] I
can see that the solution is somewhere around y=0.4.  Using Solve instead of
FindRoot does not give me any solutions.

What am I doing wrong here? Thank you in advance. Mukhtar Bekkali

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