Matrix properties
number of rows	3,175
number of columns	3,175
nonzeros	84,723
structural full rank?	yes
structural rank	3,175
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	4,204
nonzero pattern symmetry	symmetric
numeric value symmetry	67%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	A. Garon
editor	T. Davis
date	1996
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	184,873
Cholesky flop count	1.6e+07
nnz(L+U), no partial pivoting, with AMD	366,571
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	217,013
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	537,629

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4204 explicit zero entries.

SVD-based statistics:
norm(A)	36.094
min(svd(A))	3.84343e-06
cond(A)	9.39108e+06
rank(A)	3,175
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.