Matrix properties
number of rows	9,520
number of columns	9,520
nonzeros	401,200
structural full rank?	yes
structural rank	9,520
# of blocks from dmperm	2
# strongly connected comp.	2
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	A. Andrianov
editor	T. Davis
date	2006
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,500,131
Cholesky flop count	6.5e+08
nnz(L+U), no partial pivoting, with AMD	2,990,742
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	12,248,007
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	18,725,968

SVD-based statistics:
norm(A)	70.4261
min(svd(A))	4.31323e-68
cond(A)	1.63279e+69
rank(A)	9,058
sprank(A)-rank(A)	462
null space dimension	462
full numerical rank?	no
singular value gap	2.69982e+13

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.