Matrix properties
number of rows	216
number of columns	216
nonzeros	4,317
structural full rank?	yes
structural rank	216
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	35
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	4,284
Cholesky flop count	1.0e+05
nnz(L+U), no partial pivoting, with AMD	8,352
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	6,831
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	15,197

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 35 explicit zero entries.

SVD-based statistics:
norm(A)	0.130188
min(svd(A))	3.94753e-06
cond(A)	32979.6
rank(A)	216
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.