Matrix properties
number of rows	6,019
number of columns	6,019
nonzeros	40,965
structural full rank?	yes
structural rank	6,019
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	NASA
editor	G. Kumfert, A. Pothen
date	2003
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
coord	full 6019-by-2

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	113,825
Cholesky flop count	3.6e+06
nnz(L+U), no partial pivoting, with AMD	221,631
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	159,536
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	300,698

SVD-based statistics:
norm(A)	7.05562
min(svd(A))	0.000309921
cond(A)	22765.9
rank(A)	6,019
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.