Format  
A sparse matrix format is used which consists of a series of
triples (the format is called SMS, Sparse/Symbolic Matrix Storage).
The first triple is number of rows, number of columns, and a letter ("M" for integer/modular, "R" for rational, etc.). The following triples signify nonzero entries and have the form
rowindex, colindex, value. They must be in increasing lexicographical order.
The last triple is ``0 0
0'' used as an end marker. For example : 32 3200 M 1 1 345 1 2 23 2 1 77 2 200 31 30 3101 11 0 0 0 denotes a 32 by 3200 matrix with 5 nonzero entries, three of which are clustered at the top left. 

Matrices  


Software  


Collections  
Last update: Tuesday, June 5th 2012  http://ljk.imag.fr/membres/JeanGuillaume.Dumas 