Matrix properties
number of rows	8,765
number of columns	8,765
nonzeros	42,471
structural full rank?	yes
structural rank	8,765
# of blocks from dmperm	256
# strongly connected comp.	256
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	78%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Kaufhold
editor	T. Davis
date	2006
kind	counter-example problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	46,565
Cholesky flop count	4.4e+05
nnz(L+U), no partial pivoting, with AMD	84,365
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	99,409
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	204,810

SVD-based statistics:
norm(A)	1e+15
min(svd(A))	2.0662
cond(A)	4.83981e+14
rank(A)	8,759
sprank(A)-rank(A)	6
null space dimension	6
full numerical rank?	no
singular value gap	2.29824

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.