Matrix properties
number of rows	12,005
number of columns	12,005
nonzeros	259,577
structural full rank?	yes
structural rank	12,005
# of blocks from dmperm	607
# strongly connected comp.	607
explicit zero entries	302
nonzero pattern symmetry	symmetric
numeric value symmetry	43%
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	300,771
Cholesky flop count	1.1e+07
nnz(L+U), no partial pivoting, with AMD	589,537
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	395,455
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,100,667

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 302 explicit zero entries.

SVD-based statistics:
norm(A)	5.11197e+07
min(svd(A))	2.37172e-05
cond(A)	2.15539e+12
rank(A)	11,966
sprank(A)-rank(A)	39
null space dimension	39
full numerical rank?	no
singular value gap	1.02238

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.