Matrix properties
number of rows	13,694
number of columns	13,694
nonzeros	72,734
structural full rank?	yes
structural rank	13,694
# of blocks from dmperm	1,934
# strongly connected comp.	1,914
explicit zero entries	10,108
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 13694-by-1
x	full 13694-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	574,758
Cholesky flop count	1.7e+08
nnz(L+U), no partial pivoting, with AMD	1,135,822
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	681,089
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,712,691

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 10108 explicit zero entries.

SVD-based statistics:
norm(A)	1.44051e+06
min(svd(A))	1.92859e-08
cond(A)	7.46927e+13
rank(A)	13,044
sprank(A)-rank(A)	650
null space dimension	650
full numerical rank?	no
singular value gap	1.00627

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.