Matrix properties
number of rows	800
number of columns	800
nonzeros	3,200
structural full rank?	yes
structural rank	800
# 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	integer
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	C. Helmberg
editor	Y. Ye
date	1996
kind	undirected weighted random graph
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	14,365	13,962
Cholesky flop count	6.0e+05	5.0e+05
nnz(L+U), no partial pivoting	27,930	27,124
nnz(V) for QR, upper bound nnz(L) for LU	15,076	14,507
nnz(R) for QR, upper bound nnz(U) for LU	26,673	25,512

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.