Matrix properties
number of rows	466,316
number of columns	466,316
nonzeros	1,500,397
structural full rank?	yes
structural rank	466,316
# 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?	no

author	N. Gould
editor	N. Gould
date	2004
kind	optimization problem
2D/3D problem?	no

Additional fields	size and type
b	full 466316-by-1

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,274,159	1,263,167
Cholesky flop count	3.7e+06	3.7e+06
nnz(L+U), no partial pivoting	2,082,002	2,060,018
nnz(V) for QR, upper bound nnz(L) for LU	4.792298e+09	-
nnz(R) for QR, upper bound nnz(U) for LU	1.452753e+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.