Matrix properties
number of rows	39
number of columns	39
nonzeros	131
structural full rank?	yes
structural rank	39
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	B. Dembart, J. Lewis
editor	I. Duff, R. Grimes, J. Lewis
date	1981
kind	power network problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	104	108
Cholesky flop count	2.9e+02	3.2e+02
nnz(L+U), no partial pivoting	169	177
nnz(V) for QR, upper bound nnz(L) for LU	111	124
nnz(R) for QR, upper bound nnz(U) for LU	194	208

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.