Matrix properties
number of rows	1,633
number of columns	1,633
nonzeros	46,626
structural full rank?	yes
structural rank	1,633
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	7,917
nonzero pattern symmetry	symmetric
numeric value symmetry	82%
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	74,189
Cholesky flop count	4.6e+06
nnz(L+U), no partial pivoting, with AMD	146,745
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	115,855
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	305,740

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 7917 explicit zero entries.

SVD-based statistics:
norm(A)	1.85369e+09
min(svd(A))	0.0224377
cond(A)	8.26147e+10
rank(A)	1,633
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.