Matrix properties
number of rows	1,651
number of columns	1,651
nonzeros	49,062
structural full rank?	yes
structural rank	1,651
# of blocks from dmperm	13
# strongly connected comp.	1
explicit zero entries	471
nonzero pattern symmetry	symmetric
numeric value symmetry	98%
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	43,746
Cholesky flop count	1.5e+06
nnz(L+U), no partial pivoting, with AMD	85,841
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	68,164
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	241,048

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 471 explicit zero entries.

SVD-based statistics:
norm(A)	449.343
min(svd(A))	1.16425e-17
cond(A)	3.85949e+19
rank(A)	1,650
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	5.93121e+13

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.