Matrix properties
number of rows	306
number of columns	306
nonzeros	2,018
structural full rank?	yes
structural rank	306
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	NASA
editor	G. Kumfert, A. Pothen
date	2003
kind	structural problem
2D/3D problem?	yes

Additional fields	size and type
coord	full 306-by-2

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	3,224
Cholesky flop count	4.4e+04
nnz(L+U), no partial pivoting, with AMD	6,142
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,706
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	8,460

SVD-based statistics:
norm(A)	381.301
min(svd(A))	1.31316
cond(A)	290.369
rank(A)	306
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.