Matrix properties
number of rows	15,606
number of columns	15,606
nonzeros	107,362
structural full rank?	yes
structural rank	15,606
# 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 15606-by-2

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	368,416
Cholesky flop count	1.8e+07
nnz(L+U), no partial pivoting, with AMD	721,226
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	529,120
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	996,860

SVD-based statistics:
norm(A)	7.10978
min(svd(A))	0.000500972
cond(A)	14192
rank(A)	15,606
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.