Matrix properties
number of rows	800
number of columns	800
nonzeros	9,388
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'))	46,145	51,574
Cholesky flop count	6.9e+06	7.8e+06
nnz(L+U), no partial pivoting	91,490	102,348
nnz(V) for QR, upper bound nnz(L) for LU	223,383	178,498
nnz(R) for QR, upper bound nnz(U) for LU	265,350	271,501

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.