Matrix properties
number of rows	5,850
number of columns	5,850
nonzeros	42,568
structural full rank?	yes
structural rank	5,850
# of blocks from dmperm	317
# strongly connected comp.	177
explicit zero entries	2,897
nonzero pattern symmetry	6%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	P. Hollinger
editor	T. Davis
date	2001
kind	economic problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	494,583
Cholesky flop count	1.6e+08
nnz(L+U), no partial pivoting, with AMD	983,316
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	505,338
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	966,471

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2897 explicit zero entries.

SVD-based statistics:
norm(A)	27126.9
min(svd(A))	6.09597e-09
cond(A)	4.44998e+12
rank(A)	5,848
sprank(A)-rank(A)	2
null space dimension	2
full numerical rank?	no
singular value gap	3.07176

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
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.