Matrix properties
number of rows	9,129
number of columns	9,129
nonzeros	52,883
structural full rank?	yes
structural rank	9,129
# of blocks from dmperm	321
# strongly connected comp.	321
explicit zero entries	3,292
nonzero pattern symmetry	7%
numeric value symmetry	1%
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	1,112,297
Cholesky flop count	5.9e+08
nnz(L+U), no partial pivoting, with AMD	2,215,465
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,087,755
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,927,280

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3292 explicit zero entries.

SVD-based statistics:
norm(A)	1.27818e+07
min(svd(A))	3.28497e-07
cond(A)	3.89099e+13
rank(A)	8,934
sprank(A)-rank(A)	195
null space dimension	195
full numerical rank?	no
singular value gap	1.01004

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.