Matrix properties
number of rows	36,609
number of columns	36,609
nonzeros	214,643
structural full rank?	yes
structural rank	36,609
# of blocks from dmperm	1,281
# strongly connected comp.	1,281
explicit zero entries	13,312
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	7,577,614
Cholesky flop count	6.8e+09
nnz(L+U), no partial pivoting, with AMD	15,118,619
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,194,688
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	21,146,676

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 13312 explicit zero entries.

SVD-based statistics:
norm(A)	2.34469e+06
min(svd(A))	4.1623e-08
cond(A)	5.63315e+13
rank(A)	36,451
sprank(A)-rank(A)	158
null space dimension	158
full numerical rank?	no
singular value gap	5.96981

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.