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
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:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,931,855
Cholesky flop count	1.3e+09
nnz(L+U), no partial pivoting, with AMD	3,860,153
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	2,528,036
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	5,517,568

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

SVD-based statistics:
norm(A)	1.00609e+06
min(svd(A))	0.00218761
cond(A)	4.59905e+08
rank(A)	3,557
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

singular values (MAT file):	click here
SVD method used:	s = svd (full (A)) ;
status:	ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.