Matrix properties
number of rows	49
number of columns	49
nonzeros	167
structural full rank?	yes
structural rank	49
# 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'))	129	139
Cholesky flop count	3.6e+02	4.4e+02
nnz(L+U), no partial pivoting	209	229
nnz(V) for QR, upper bound nnz(L) for LU	149	149
nnz(R) for QR, upper bound nnz(U) for LU	275	285

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.