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Fabrice P. Laussy
11/13/99 07:16am

>I'm dealing with large linear systems which I have to solve. LinearSolve does it ok, but I'm looking for a faster solution, so the questions are:
>
>1. Will Mathematica4 do it much faster than Mathematica 3 with LinearSolve?
>
>2. The Book says that one should use NSolve when the matrices are sparse, but since my equations system is very large, it's impossible to write every equation or so.
>
>What is recommended in this case?
>
>Thanks a lot!!!

Mathematica 4 indeed has gained considerable speed for Matrix manipulation, at such an extent that I wonder what they were doing before for the increase be so much (may be compilation has come in between)!

What do you mean, impossible to write every equations? If you are insistent that Mathematica is to solve your system, if the matrice involved are very great indeed, displaying them should be avoided. You can then read the system from a file, and write the solution in a file, without anything going on the front end.

Laussy.

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Subject (listing for 'Sparse Matrices')
Author Date Posted
Sparse Matrices Kurt Taretto 10/25/99 08:34am
Re: Sparse Matrices Fabrice P. L... 11/13/99 07:16am
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