try www.nr.com.

they do have very clear explaination of the algorithm you need. if you want,
you can also copy their code.

good luck.


"Matt T." <tamayomz@hotmail.com> wrote:
>
>For a Science Fair I am trying to write a program that will a system (equation)
>of 3 matrices of which only one is a square matrix:
>
>[4 x 5] [5 x 4] = [4 x 4] Matrix
>Inverses cannot be used. There is no inverse of non square matrices.
>I may just settle for square matrices. Does anyone know a short algortihm
>to calculate the determinant of a matrix? The inverse would be nice but
>if it just the determinant that is fine.
>If anyone know of Gauss[-Jordan] elimination algortihms for systems of equations
>please say something. I would really appreciate.
>
>Thanks,
>Really Big Headache