Matrix properties
number of rows	2,586
number of columns	923,269
nonzeros	8,011,362
structural full rank?	yes
structural rank	2,586
# of blocks from dmperm	1
# strongly connected comp.	8
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 2586-by-1
c	full 923269-by-1
lo	full 923269-by-1
hi	full 923269-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:	result
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,052,862,453
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,522,581

SVD-based statistics:
norm(A)	496.004
min(svd(A))	1
cond(A)	496.004
rank(A)	2,586
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (R)) ; where [~,R,E] = spqr (A') with droptol of zero
status:	ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.