Matrix properties
number of rows	7,740
number of columns	7,740
nonzeros	456,188
structural full rank?	yes
structural rank	7,740
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	1,824
nonzero pattern symmetry	symmetric
numeric value symmetry	77%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Baggag, Y. Saad
editor	A. Baggag, Y. Saad
date	1994
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,612,967
Cholesky flop count	5.8e+08
nnz(L+U), no partial pivoting, with AMD	3,218,194
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,408,294
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	3,107,372

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1824 explicit zero entries.

SVD-based statistics:
norm(A)	7.24983
min(svd(A))	2.6331e-06
cond(A)	2.75335e+06
rank(A)	7,740
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.