Matrix properties
number of rows	41,490
number of columns	41,490
nonzeros	488,633
structural full rank?	yes
structural rank	41,490
# of blocks from dmperm	1,997
# strongly connected comp.	1,017
entries not in dmperm blocks	6,233
explicit zero entries	77,323
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:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	11,427,139	10,765,252	11,081,765
Cholesky flop count	1.4e+10	1.0e+10	1.1e+10
nnz(L+U), no partial pivoting	22,812,788	21,489,014	22,128,273
nnz(V) for QR, upper bound nnz(L) for LU	14,403,942	7,437,701	6,554,502
nnz(R) for QR, upper bound nnz(U) for LU	28,482,298	19,539,938	19,530,494

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 77323 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.