Matrix properties
number of rows	17,730
number of columns	17,730
nonzeros	183,325
structural full rank?	yes
structural rank	17,730
# of blocks from dmperm	877
# strongly connected comp.	457
entries not in dmperm blocks	2,871
explicit zero entries	19,991
nonzero pattern symmetry	4%
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:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	3,904,845	3,235,226	3,234,264
Cholesky flop count	3.9e+09	2.2e+09	2.2e+09
nnz(L+U), no partial pivoting	7,791,960	6,452,722	6,453,669
nnz(V) for QR, upper bound nnz(L) for LU	4,199,769	2,635,688	2,501,277
nnz(R) for QR, upper bound nnz(U) for LU	7,452,790	5,254,789	5,174,378

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 19991 explicit zero entries.

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.