Matrix properties
number of rows	4,284
number of columns	1,096,894
nonzeros	11,284,032
structural full rank?	yes
structural rank	4,284
# of blocks from dmperm	1
# strongly connected comp.	5
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	integer
structure	rectangular
Cholesky candidate?	no
positive definite?	no

author	P. Nobili
editor	J. Beasley
date	2005
kind	linear programming problem
2D/3D problem?	no

Additional fields	size and type
b	full 4284-by-1
c	full 1096894-by-1
lo	full 1096894-by-1
hi	full 1096894-by-1
z0	full 1-by-1

Notes:

Hans Mittelmann test set, http://plato.asu.edu/ftp/lptestset
minimize c'*x, subject to A*x=b and lo <= x <= hi           
                                                            
RAIL: set covering problems from the Italian railroad, see  
http://people.brunel.ac.uk/~mastjjb/jeb/orlib/scpinfo.html  

Ordering statistics:	AMD	METIS
nnz(V) for QR, upper bound nnz(L) for LU	2.598056e+09	3.005451e+09
nnz(R) for QR, upper bound nnz(U) for LU	6,256,119	5,747,690

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.