Matrix properties
number of rows	534,388
number of columns	534,388
nonzeros	1,643,420
structural full rank?	yes
structural rank	534,388
# 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	A. Andrianov
editor	T. Davis
date	2006
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,314,583	1,096,499
Cholesky flop count	3.6e+06	2.4e+06
nnz(L+U), no partial pivoting	2,094,778	1,658,610
nnz(V) for QR, upper bound nnz(L) for LU	1,133,319	-
nnz(R) for QR, upper bound nnz(U) for LU	3.116194e+10	-

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.