Matrix properties
number of rows	7,320
number of columns	7,320
nonzeros	324,772
structural full rank?	yes
structural rank	7,320
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	12
nonzero pattern symmetry	64%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	R. Goodwin
editor	T. Davis
date	1995
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	597,520
Cholesky flop count	7.7e+07
nnz(L+U), no partial pivoting, with AMD	1,187,720
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,416,264
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	4,678,957

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 12 explicit zero entries.

SVD-based statistics:
norm(A)	23370.9
min(svd(A))	1.19428e-06
cond(A)	1.9569e+10
rank(A)	7,320
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.