Matrix properties
number of rows	20,614
number of columns	20,614
nonzeros	111,903
structural full rank?	yes
structural rank	20,614
# of blocks from dmperm	2,774
# strongly connected comp.	2,754
entries not in dmperm blocks	12,569
explicit zero entries	15,279
nonzero pattern symmetry	0%
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

Additional fields	size and type
b	full 20614-by-1
x	full 20614-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	978,309	1,082,399	1,039,273
Cholesky flop count	3.2e+08	3.7e+08	4.0e+08
nnz(L+U), no partial pivoting	1,936,004	2,144,184	2,070,501
nnz(V) for QR, upper bound nnz(L) for LU	1,103,778	706,540	697,388
nnz(R) for QR, upper bound nnz(U) for LU	2,920,225	2,208,598	2,073,788

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 15279 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.