Matrix properties
number of rows	974
number of columns	974
nonzeros	37,652
structural full rank?	yes
structural rank	974
# of blocks from dmperm	2
# strongly connected comp.	1
explicit zero entries	3,130
nonzero pattern symmetry	symmetric
numeric value symmetry	53%
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	33,167
Cholesky flop count	1.4e+06
nnz(L+U), no partial pivoting, with AMD	65,360
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	43,529
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	132,548

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3130 explicit zero entries.

SVD-based statistics:
norm(A)	0.259777
min(svd(A))	2.52764e-07
cond(A)	1.02774e+06
rank(A)	974
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.