Matrix properties
number of rows	1,159
number of columns	1,159
nonzeros	11,047
structural full rank?	yes
structural rank	1,159
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	296
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
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	16,689
Cholesky flop count	3.0e+05
nnz(L+U), no partial pivoting, with AMD	32,219
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	20,342
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	44,799

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 296 explicit zero entries.

SVD-based statistics:
norm(A)	116.551
min(svd(A))	8.77662e-18
cond(A)	1.32798e+19
rank(A)	1,158
sprank(A)-rank(A)	1
null space dimension	1
full numerical rank?	no
singular value gap	5.9007e+12

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.