Matrix properties
number of rows	10,429
number of columns	10,429
nonzeros	103,599
structural full rank?	yes
structural rank	10,429
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	NASA
editor	G. Kumfert, A. Pothen
date	1995
kind	duplicate structural problem
2D/3D problem?	yes

Notes:

Identical to Pothen/shuttle_eddy; the latter has xyz coordinates.

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	326,936
Cholesky flop count	1.7e+07
nnz(L+U), no partial pivoting, with AMD	643,443
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	566,762
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,108,728

SVD-based statistics:
norm(A)	16.1416
min(svd(A))	1.1553e-18
cond(A)	1.39717e+19
rank(A)	9,757
sprank(A)-rank(A)	672
null space dimension	672
full numerical rank?	no
singular value gap	7.0787e+11

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.