Matrix properties
number of rows	27,534
number of columns	27,534
nonzeros	151,063
structural full rank?	yes
structural rank	27,534
# of blocks from dmperm	3,614
# strongly connected comp.	3,594
explicit zero entries	20,459
nonzero pattern symmetry	0%
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

Additional fields	size and type
b	full 27534-by-1
x	full 27534-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,441,347
Cholesky flop count	5.3e+08
nnz(L+U), no partial pivoting, with AMD	2,855,160
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,667,372
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	4,407,516

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 20459 explicit zero entries.

SVD-based statistics:
norm(A)	512.046
min(svd(A))	6.21928e-05
cond(A)	8.2332e+06
rank(A)	27,534
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 (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.