Matrix properties
number of rows	6,245
number of columns	6,245
nonzeros	42,581
structural full rank?	yes
structural rank	6,245
# of blocks from dmperm	6
# strongly connected comp.	6
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	integer
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	B. Alemdar
editor	T. Davis
date	2003
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	149,205
Cholesky flop count	1.0e+07
nnz(L+U), no partial pivoting, with AMD	292,165
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	267,458
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	511,852

SVD-based statistics:
norm(A)	69.5188
min(svd(A))	0.00329862
cond(A)	21075.1
rank(A)	6,245
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.