Matrix properties
number of rows	2,203
number of columns	2,203
nonzeros	67,830
structural full rank?	yes
structural rank	2,203
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	2,151
nonzero pattern symmetry	symmetric
numeric value symmetry	97%
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	70,045
Cholesky flop count	3.0e+06
nnz(L+U), no partial pivoting, with AMD	137,887
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	128,989
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	470,960

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2151 explicit zero entries.

SVD-based statistics:
norm(A)	1.52173
min(svd(A))	5.42507e-09
cond(A)	2.80499e+08
rank(A)	2,203
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.