Matrix properties
number of rows	1,484
number of columns	1,484
nonzeros	6,110
structural full rank?	yes
structural rank	1,484
# of blocks from dmperm	3
# strongly connected comp.	3
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	5%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	D. Ndereyimana
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1994
kind	power network problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	5,919	6,388	6,048
Cholesky flop count	2.6e+04	3.1e+04	2.7e+04
nnz(L+U), no partial pivoting	10,354	11,292	10,612
nnz(V) for QR, upper bound nnz(L) for LU	7,508	9,188	7,630
nnz(R) for QR, upper bound nnz(U) for LU	14,796	18,221	14,642

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.