Matrix properties
number of rows	11,790
number of columns	11,790
nonzeros	107,383
structural full rank?	yes
structural rank	11,790
# of blocks from dmperm	597
# strongly connected comp.	317
explicit zero entries	7,288
nonzero pattern symmetry	5%
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	1,749,473
Cholesky flop count	1.1e+09
nnz(L+U), no partial pivoting, with AMD	3,487,156
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	2,039,151
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	3,614,040

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7288 explicit zero entries.

SVD-based statistics:
norm(A)	54178.4
min(svd(A))	1.24949e-08
cond(A)	4.33605e+12
rank(A)	11,786
sprank(A)-rank(A)	4
null space dimension	4
full numerical rank?	no
singular value gap	2.41986

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.