Matrix properties
number of rows	40,806
number of columns	40,806
nonzeros	203,622
structural full rank?	yes
structural rank	40,806
# 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	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	E. Dolan, J. More'
editor	N. Gould
date	2000
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	1,086,577	994,944	1,000,962
Cholesky flop count	1.2e+08	9.7e+07	9.7e+07
nnz(L+U), no partial pivoting	2,132,348	1,949,082	1,961,118
nnz(V) for QR, upper bound nnz(L) for LU	2,085,965	1,764,811	1,822,664
nnz(R) for QR, upper bound nnz(U) for LU	3,819,669	3,264,025	3,363,277

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.