Matrix properties
number of rows	16,554
number of columns	16,554
nonzeros	54,040
structural full rank?	yes
structural rank	16,554
# of blocks from dmperm	555
# strongly connected comp.	555
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author	N. Gould
editor	N. Gould
date	1994
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	142,666
Cholesky flop count	1.0e+07
nnz(L+U), no partial pivoting, with AMD	268,778
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	360,371
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	680,921

SVD-based statistics:
norm(A)	1.2705e+11
min(svd(A))	3.30002e-08
cond(A)	3.84999e+18
rank(A)	14,617
sprank(A)-rank(A)	1,937
null space dimension	1,937
full numerical rank?	no
singular value gap	1.00169

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.