Matrix properties
number of rows	1,650
number of columns	1,650
nonzeros	7,419
structural full rank?	yes
structural rank	1,650
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	0
nonzero pattern symmetry	57%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Norris
editor	T. Davis
date	2003
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,771
Cholesky flop count	2.1e+04
nnz(L+U), no partial pivoting, with AMD	9,892
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,080
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	9,751

SVD-based statistics:
norm(A)	516.923
min(svd(A))	1.05656e-10
cond(A)	4.8925e+12
rank(A)	1,549
sprank(A)-rank(A)	101
null space dimension	101
full numerical rank?	no
singular value gap	1.0106

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.