Matrix properties
number of rows	2,568
number of columns	2,568
nonzeros	75,628
structural full rank?	yes
structural rank	2,568
# of blocks from dmperm	1
# strongly connected comp.	1
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	81,264
Cholesky flop count	3.1e+06
nnz(L+U), no partial pivoting, with AMD	159,960
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	158,890
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	444,278

SVD-based statistics:
norm(A)	1.25842e+10
min(svd(A))	1.06027e-05
cond(A)	1.18688e+15
rank(A)	1,434
sprank(A)-rank(A)	1,134
null space dimension	1,134
full numerical rank?	no
singular value gap	1.00404

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.