Matrix properties
number of rows	441
number of columns	441
nonzeros	26,839
structural full rank?	yes
structural rank	441
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
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	18,386
Cholesky flop count	8.5e+05
nnz(L+U), no partial pivoting, with AMD	36,331
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	22,546
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	50,552

SVD-based statistics:
norm(A)	6.99964e+08
min(svd(A))	0.0680436
cond(A)	1.0287e+10
rank(A)	441
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.