Matrix properties
number of rows	48,962
number of columns	48,962
nonzeros	512,084
structural full rank?	yes
structural rank	48,962
# 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?	yes

author	P. Barrera, A. Perez, L. Castellanos
editor	P. Toint
date	1991
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	2,752,623	2,700,347
Cholesky flop count	3.7e+08	3.6e+08
nnz(L+U), no partial pivoting	5,456,284	5,351,732
nnz(V) for QR, upper bound nnz(L) for LU	4,472,922	4,497,824
nnz(R) for QR, upper bound nnz(U) for LU	8,677,276	8,534,640

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.