Matrix properties
number of rows	35,550
number of columns	35,550
nonzeros	412,306
structural full rank?	yes
structural rank	35,550
# of blocks from dmperm	1,717
# strongly connected comp.	877
explicit zero entries	62,990
nonzero pattern symmetry	3%
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	9,692,479
Cholesky flop count	1.2e+10
nnz(L+U), no partial pivoting, with AMD	19,349,408
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	13,516,699
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	23,901,708

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 62990 explicit zero entries.

SVD-based statistics:
norm(A)	108310
min(svd(A))	1.07325e-08
cond(A)	1.00918e+13
rank(A)	35,530
sprank(A)-rank(A)	20
null space dimension	20
full numerical rank?	no
singular value gap	1.04384

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.