Matrix properties
number of rows	30,237
number of columns	30,237
nonzeros	1,450,163
structural full rank?	yes
structural rank	30,237
# 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	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	2,730,230	3,116,057
Cholesky flop count	3.9e+08	5.2e+08
nnz(L+U), no partial pivoting	5,430,223	6,201,877
nnz(V) for QR, upper bound nnz(L) for LU	7,395,686	5,879,828
nnz(R) for QR, upper bound nnz(U) for LU	14,651,764	11,600,920

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.