Matrix properties
number of rows	16,558
number of columns	16,558
nonzeros	149,658
structural full rank?	yes
structural rank	16,558
# 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	J. Kennington
editor	G. Kumfert, A. Pothen
date	2004
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,605,971
Cholesky flop count	9.2e+08
nnz(L+U), no partial pivoting, with AMD	3,195,384
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,343,582
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	21,897,560

SVD-based statistics:
norm(A)	17.0335
min(svd(A))	2.22514e-18
cond(A)	7.65503e+18
rank(A)	16,519
sprank(A)-rank(A)	39
null space dimension	39
full numerical rank?	no
singular value gap	2.79877e+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.