MathGroup Archive 1997

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Re: Solving non-linear equations

  • To: mathgroup at
  • Subject: [mg6164] Re: [mg6154] Solving non-linear equations
  • From: seanross at
  • Date: Thu, 27 Feb 1997 02:52:04 -0500
  • Sender: owner-wri-mathgroup at

Konopnicki David wrote:
> Hi,
> I am new to mathematica. I want to find some numeric solutions to a system
> of non-linear equations. I tried to do it with NSolve but I was not able
> to get a solution even with simple systems like:
> x1==10
> x2== 10*2^x1
> I'd like to solve systems like this one:
> x1==10
> x2==2^x1
> x1=f[x2]
> ...
> is it possible to do this in mathematica?
> Thanks
> -David
> -------------------------------------------------------------------------
> David Konopnicki - konop at
> -------------------------------------------------------------------------

Mathematica is a complete programming language, not just a collection of 
 functions.  There may be no built in function that does what you want, 
but solving this sort of problem is simple if you have any experience 
with numerical methods in general.  I would try fixed point iteration on 
the set of equations written in vector form.  Mathematica is a 
convenient platform to set that up and even has recursion and fixed 
point iteration type commands built in.

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