Matrix properties
number of rows	588
number of columns	588
nonzeros	24,270
structural full rank?	yes
structural rank	588
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	R. Grimes
editor	T. Davis
date	1995
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	45,404
Cholesky flop count	4.5e+06
nnz(L+U), no partial pivoting, with AMD	90,220
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	40,616
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	71,894

SVD-based statistics:
norm(A)	6.83308
min(svd(A))	6.02874e-06
cond(A)	1.13342e+06
rank(A)	588
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.