Matrix properties
number of rows	64,089
number of columns	64,089
nonzeros	376,395
structural full rank?	yes
structural rank	64,089
# of blocks from dmperm	2,241
# strongly connected comp.	2,241
explicit zero entries	23,340
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	17,311,934
Cholesky flop count	2.2e+10
nnz(L+U), no partial pivoting, with AMD	34,559,779
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	30,434,268
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	53,721,469

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 23340 explicit zero entries.

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.