Matrix properties
number of rows	400
number of columns	400
nonzeros	399
structural full rank?	no
structural rank	399
# of blocks from dmperm	401
# strongly connected comp.	400
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	G. Stewart
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1978
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	400
Cholesky flop count	4.0e+02
nnz(L+U), no partial pivoting, with AMD	400
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	400
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	400

SVD-based statistics:
norm(A)	2.66e-14
min(svd(A))	0
cond(A)	Inf
rank(A)	399
sprank(A)-rank(A)	0
null space dimension	1
full numerical rank?	no
singular value gap	Inf

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.