Matrix properties
number of rows	5,026
number of columns	5,026
nonzeros	94,026
structural full rank?	yes
structural rank	5,026
# 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	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	74,666
Cholesky flop count	1.7e+06
nnz(L+U), no partial pivoting, with AMD	144,306
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	123,684
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	363,925

SVD-based statistics:
norm(A)	51.5464
min(svd(A))	2.85579e-56
cond(A)	1.80498e+57
rank(A)	4,087
sprank(A)-rank(A)	939
null space dimension	939
full numerical rank?	no
singular value gap	7.54656e+10

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.