Matrix properties
number of rows	2,163
number of columns	2,163
nonzeros	74,464
structural full rank?	yes
structural rank	2,163
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	19,569
nonzero pattern symmetry	symmetric
numeric value symmetry	73%
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	104,853
Cholesky flop count	7.5e+06
nnz(L+U), no partial pivoting, with AMD	207,543
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	278,224
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	787,860

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 19569 explicit zero entries.

SVD-based statistics:
norm(A)	81.5653
min(svd(A))	4.18672e-17
cond(A)	1.94819e+18
rank(A)	2,162
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	1.29302e+12

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.