Matrix properties
number of rows	839
number of columns	839
nonzeros	22,460
structural full rank?	yes
structural rank	839
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	255
nonzero pattern symmetry	symmetric
numeric value symmetry	89%
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	15,011
Cholesky flop count	2.9e+05
nnz(L+U), no partial pivoting, with AMD	29,183
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	18,705
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	55,686

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 255 explicit zero entries.

SVD-based statistics:
norm(A)	15.0726
min(svd(A))	0.000460221
cond(A)	32750.8
rank(A)	839
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.