Matrix properties
number of rows	189,860
number of columns	189,860
nonzeros	1,339,638
structural full rank?	yes
structural rank	189,860
# of blocks from dmperm	69
# strongly connected comp.	67
entries not in dmperm blocks	116
explicit zero entries	7,635
nonzero pattern symmetry	99%
numeric value symmetry	6%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Wang
editor	T. Davis
date	2007
kind	power network problem
2D/3D problem?	no

Additional fields	size and type
b	full 189860-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,317,751	1,531,409	2,038,167
Cholesky flop count	2.3e+07	3.6e+07	8.7e+07
nnz(L+U), no partial pivoting	2,445,642	2,872,958	3,886,590
nnz(V) for QR, upper bound nnz(L) for LU	2,389,738	2,447,677	2,269,309
nnz(R) for QR, upper bound nnz(U) for LU	4,803,364	4,956,167	4,468,777

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7635 explicit zero entries.

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.