Matrix properties
number of rows	24,842
number of columns	24,842
nonzeros	158,426
structural full rank?	yes
structural rank	24,842
# of blocks from dmperm	31
# strongly connected comp.	7
entries not in dmperm blocks	260
explicit zero entries	1,555
nonzero pattern symmetry	98%
numeric value symmetry	10%
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 24842-by-1

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	124,423	143,310	135,141
Cholesky flop count	8.6e+05	1.4e+06	1.0e+06
nnz(L+U), no partial pivoting	224,004	261,778	245,700
nnz(V) for QR, upper bound nnz(L) for LU	208,510	221,361	192,700
nnz(R) for QR, upper bound nnz(U) for LU	427,644	484,281	386,379

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1555 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.