Matrix properties
number of rows	848
number of columns	848
nonzeros	24,369
structural full rank?	yes
structural rank	848
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	243
nonzero pattern symmetry	symmetric
numeric value symmetry	98%
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	20,289
Cholesky flop count	6.0e+05
nnz(L+U), no partial pivoting, with AMD	39,730
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	32,364
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	103,284

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 243 explicit zero entries.

SVD-based statistics:
norm(A)	0.645912
min(svd(A))	1.26503e-08
cond(A)	5.10589e+07
rank(A)	848
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.