Matrix properties
number of rows	4,720
number of columns	4,720
nonzeros	20,042
structural full rank?	yes
structural rank	4,720
# of blocks from dmperm	1,641
# strongly connected comp.	81
explicit zero entries	0
nonzero pattern symmetry	72%
numeric value symmetry	18%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	W. Shyy
editor	T. Davis
date	1994
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	82,741
Cholesky flop count	2.9e+06
nnz(L+U), no partial pivoting, with AMD	160,762
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	97,599
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	184,109

SVD-based statistics:
norm(A)	188.7
min(svd(A))	4.93428e-20
cond(A)	3.82427e+21
rank(A)	4,712
sprank(A)-rank(A)	8
null space dimension	8
full numerical rank?	no
singular value gap	13091.6

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.