Matrix properties
number of rows	6,867
number of columns	6,867
nonzeros	98,671
structural full rank?	yes
structural rank	6,867
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

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	227,362
Cholesky flop count	1.1e+07
nnz(L+U), no partial pivoting, with AMD	447,857
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	263,488
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	512,995

SVD-based statistics:
norm(A)	1.113e+10
min(svd(A))	0.00129234
cond(A)	8.61233e+12
rank(A)	6,667
sprank(A)-rank(A)	200
null space dimension	200
full numerical rank?	no
singular value gap	1.00076

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.