This directory contains matrices that we used to test our Black Box factorization
software with.  The software compute the factors of their determinants without 
expanding the determinant as a polyomial then factoring it.

The matrices in the first benchmark are in the files B4, B5, B6, B7, B8, and B9.

The matrices for heron3d, heron4d, robotarms, heron5d are in the files
heron3dB, heron4dB, robotarms2B, and heron5dB.

The remaning files are Maple programs that generate the heron and robotarms matrices.
They are Dixon matrices arising from systems of polynomial equations with parameters.

Tian Chen and Michael Monagan