Matrix properties
number of rows	494
number of columns	494
nonzeros	1,666
structural full rank?	yes
structural rank	494
# 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	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	D. Tylavsky
editor	I. Duff, R. Grimes, J. Lewis
date	1985
kind	power network problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,414	1,522
Cholesky flop count	4.8e+03	6.0e+03
nnz(L+U), no partial pivoting	2,334	2,550
nnz(V) for QR, upper bound nnz(L) for LU	1,776	2,106
nnz(R) for QR, upper bound nnz(U) for LU	3,446	4,035

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.