Tue Feb 26 00:53:07 CET 2013

Matrix operations

This might be interesting[1].  However, at some point I probably need
transparent algorithms.  But for now it's all numbers.

Hmm... this looks like a fairly new thing.

Let's do it the hard way.

Implemented Gauss elimination.  Gauss-Jordan is probably better.  (
Why?  The N^3 coefficient is half as large.  Is there also a numeric
stability constraint?  However, for N small it might not make such a
difference. )

[1] http://docs.racket-lang.org/math/matrices.html