Matrix properties
number of rows	1,250
number of columns	1,250
nonzeros	7,300
structural full rank?	yes
structural rank	1,250
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	79%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	K. Meerbergen
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	21,927
Cholesky flop count	7.2e+05
nnz(L+U), no partial pivoting, with AMD	42,604
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	39,117
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	71,147

SVD-based statistics:
norm(A)	176.517
min(svd(A))	0.100932
cond(A)	1748.87
rank(A)	1,250
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.