Matrix properties
number of rows	1,000
number of columns	1,000
nonzeros	3,996
structural full rank?	yes
structural rank	1,000
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	K. Meerbergen, D. Roose
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1994
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,997
Cholesky flop count	9.0e+03
nnz(L+U), no partial pivoting, with AMD	4,994
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	2,997
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	4,990

SVD-based statistics:
norm(A)	200977
min(svd(A))	0.151363
cond(A)	1.32778e+06
rank(A)	1,000
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.