Matrix properties
number of rows	17,222
number of columns	17,222
nonzeros	211,064
structural full rank?	yes
structural rank	17,222
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	G. Kumfert, A. Pothen
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	computational fluid dynamics problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,337,186
Cholesky flop count	1.1e+09
nnz(L+U), no partial pivoting, with AMD	4,657,150
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	5,886,754
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	14,232,397

SVD-based statistics:
norm(A)	15.2599
min(svd(A))	0.00158395
cond(A)	9634.12
rank(A)	17,222
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.