Matrix properties
number of rows	32,460
number of columns	32,460
nonzeros	328,036
structural full rank?	yes
structural rank	32,460
# of blocks from dmperm	3
# strongly connected comp.	3
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	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	968,227	1,165,572	968,227
Cholesky flop count	1.6e+08	2.5e+08	1.6e+08
nnz(L+U), no partial pivoting	1,903,994	2,298,684	1,903,994
nnz(V) for QR, upper bound nnz(L) for LU	19,297,162	22,275,466	21,686,413
nnz(R) for QR, upper bound nnz(U) for LU	36,796,010	41,769,092	37,074,045

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.