Matrix properties
number of rows	961
number of columns	961
nonzeros	4,681
structural full rank?	yes
structural rank	961
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	author unknown
editor	Z. Bai, D. Day, J. Demmel, J. Dongarra
date	1992
kind	subsequent computational fluid dynamics problem
2D/3D problem?	yes

Notes:

next: Bai/cdde4 first: Bai/cdde1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	10,917
Cholesky flop count	2.1e+05
nnz(L+U), no partial pivoting, with AMD	20,873
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	17,778
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	32,261

SVD-based statistics:
norm(A)	7.90263
min(svd(A))	0.00179282
cond(A)	4407.92
rank(A)	961
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.