Matrix properties
number of rows	3,557
number of columns	3,557
nonzeros	1,385,317
structural full rank?	yes
structural rank	3,557
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	2,456
nonzero pattern symmetry	symmetric
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Norris
editor	T. Davis
date	2003
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,931,855	2,649,346
Cholesky flop count	1.3e+09	2.5e+09
nnz(L+U), no partial pivoting	3,860,153	5,295,135
nnz(V) for QR, upper bound nnz(L) for LU	2,771,498	3,357,590
nnz(R) for QR, upper bound nnz(U) for LU	4,958,966	5,213,106

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2456 explicit zero entries.

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.