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Thread Subject: nonlinear system algebraic equations

Subject: nonlinear system algebraic equations

From: Francesco

Date: 19 Oct, 2007 22:15:58

Message: 1 of 2

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Hi Everybody,
I am dealing with a system of three nonlinear algebraic
equations (coming off fron a PDE once I truncate its
Fourier series solution at the second order).
Do you have any suggestions about how can I solve them?
Any useful Matlab routine or if some of you has a good
one...
Many thanks,
Francesco

Subject: Re: nonlinear system algebraic equations

From: Lassoued

Date: 20 Oct, 2007 09:16:02

Message: 2 of 2

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Hi,
You can use simply a Newton method, it's easy for implementation and
enough good in the most of case. if you have the optimization toolbox
already installed then you can just use the function fsolve ( please read
the documentation in matlab help) if not you can use an algorithm which is
available online colled mmfsolve
(http://www.nd.edu/~wschnei1/Courses/CBE_445/Fall06/Lectures/Lecture2/mmfsolve.m).

On Sat, 20 Oct 2007 07:15:58 +0900, Francesco
<fsarnari@maths.leeds.ac.uk> wrote:

> Hi Everybody,
> I am dealing with a system of three nonlinear algebraic
> equations (coming off fron a PDE once I truncate its
> Fourier series solution at the second order).
> Do you have any suggestions about how can I solve them?
> Any useful Matlab routine or if some of you has a good
> one...
> Many thanks,
> Francesco

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Tag	Applied By	Date/Time
roots	Francesco	19 Oct, 2007 18:20:20
nonlinear	Francesco	19 Oct, 2007 18:20:20
algebraic	Francesco	19 Oct, 2007 18:20:20
equation	Francesco	19 Oct, 2007 18:20:20

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