Matrix properties
number of rows	3,079
number of columns	3,079
nonzeros	53,099
structural full rank?	yes
structural rank	3,079
# of blocks from dmperm	3
# strongly connected comp.	3
explicit zero entries	744
nonzero pattern symmetry	symmetric
numeric value symmetry	100%
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	63,978
Cholesky flop count	1.8e+06
nnz(L+U), no partial pivoting, with AMD	124,877
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	127,553
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	358,873

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 744 explicit zero entries.

SVD-based statistics:
norm(A)	262.411
min(svd(A))	0.000214562
cond(A)	1.22301e+06
rank(A)	3,079
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.