Matrix properties
number of rows	1,500
number of columns	1,500
nonzeros	97,645
structural full rank?	yes
structural rank	1,500
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	100%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	L. Langemyr
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
b	full 1500-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	107,541
Cholesky flop count	8.5e+06
nnz(L+U), no partial pivoting, with AMD	213,582
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	117,814
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	301,962

SVD-based statistics:
norm(A)	0.632848
min(svd(A))	4.47174e-07
cond(A)	1.41522e+06
rank(A)	1,500
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.