Matrix properties
number of rows	4,875
number of columns	4,875
nonzeros	315,891
structural full rank?	yes
structural rank	4,875
# 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	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	960,811	1,011,036
Cholesky flop count	2.6e+08	2.8e+08
nnz(L+U), no partial pivoting	1,916,747	2,017,197
nnz(V) for QR, upper bound nnz(L) for LU	1,067,304	1,229,826
nnz(R) for QR, upper bound nnz(U) for LU	2,148,267	2,318,223

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.