Matrix properties
number of rows	10,800
number of columns	10,800
nonzeros	810,000
structural full rank?	yes
structural rank	10,800
# 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	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	P. Chen
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,283,724	1,414,836
Cholesky flop count	2.6e+08	3.2e+08
nnz(L+U), no partial pivoting	2,556,648	2,818,872
nnz(V) for QR, upper bound nnz(L) for LU	3,536,244	2,411,676
nnz(R) for QR, upper bound nnz(U) for LU	8,352,504	4,813,488

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.