Matrix properties
number of rows	6,774
number of columns	6,774
nonzeros	33,744
structural full rank?	yes
structural rank	6,774
# of blocks from dmperm	1,311
# strongly connected comp.	1,291
explicit zero entries	4,948
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 6774-by-1
x	full 6774-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	198,431
Cholesky flop count	3.7e+07
nnz(L+U), no partial pivoting, with AMD	390,088
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	233,673
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	603,053

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4948 explicit zero entries.

SVD-based statistics:
norm(A)	256.105
min(svd(A))	9.55002e-05
cond(A)	2.68172e+06
rank(A)	6,774
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.