Matrix properties
number of rows	2,283
number of columns	2,283
nonzeros	47,901
structural full rank?	yes
structural rank	2,283
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	836
nonzero pattern symmetry	symmetric
numeric value symmetry	86%
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	49,911
Cholesky flop count	1.4e+06
nnz(L+U), no partial pivoting, with AMD	97,539
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	82,052
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	245,708

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 836 explicit zero entries.

SVD-based statistics:
norm(A)	89.2306
min(svd(A))	0.000240228
cond(A)	371441
rank(A)	2,283
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.