Matrix properties
number of rows	1,090
number of columns	1,090
nonzeros	3,546
structural full rank?	yes
structural rank	1,090
# of blocks from dmperm	1,073
# strongly connected comp.	801
explicit zero entries	0
nonzero pattern symmetry	32%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Godet-Thobie
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1991
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	3,339
Cholesky flop count	3.2e+04
nnz(L+U), no partial pivoting, with AMD	5,588
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,387
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	5,895

SVD-based statistics:
norm(A)	1.8225e+06
min(svd(A))	0.995312
cond(A)	1.83108e+06
rank(A)	1,090
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.