🚀 go-pugleaf

In article <92Dec17.174419.27750@acs.ucalgary.ca>
mgh@hobbes.phys.ucalgary.ca (Mike Henderson) writes:

>
>I am trying to solve a set of 8 nonlinear equations in 8 unknowns.
>I have tried the Newton-Raphson technique given in NR (I know
>roughly what the solution should be) but havent had much luck. Are
>there any more robust methods to choose from?
>
>Mike Henderson
>Dept. of Physics and Astronomy
>University of Calgary
>mgh@hobbes.phys.ucalgary.ca
>

 I had used the Newton-Raphson method in NR on a set of 5 non-linear
 equations in 5 unknowns.  I was happy to finally get the method to
 converge regulary.

 To get the method to converge on regular basis, it was necessary to
 re-order my equations, by placing:
      -- linear equations first
      -- slightly non-linear equations next
      -- non-linear equations last.

 I found this information in some documentation (???)  that I
 was reading.

 I hope this helps.

 Later,
 Mark