Matrix properties
number of rows	2,603
number of columns	2,603
nonzeros	77,031
structural full rank?	yes
structural rank	2,603
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	750
nonzero pattern symmetry	symmetric
numeric value symmetry	99%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

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	67,366
Cholesky flop count	2.2e+06
nnz(L+U), no partial pivoting, with AMD	132,129
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	118,830
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	388,507

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 750 explicit zero entries.

SVD-based statistics:
norm(A)	92.3139
min(svd(A))	0.00046552
cond(A)	198303
rank(A)	2,603
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.