Matrix properties
number of rows	16,782
number of columns	16,782
nonzeros	678,998
structural full rank?	yes
structural rank	16,782
# 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	26,433,573
Cholesky flop count	8.2e+10
nnz(L+U), no partial pivoting, with AMD	52,850,364
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	56,342,358
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	83,494,245

SVD-based statistics:
norm(A)	63.9865
min(svd(A))	2.51841e-19
cond(A)	2.54075e+20
rank(A)	12,102
sprank(A)-rank(A)	4,680
null space dimension	4,680
full numerical rank?	no
singular value gap	2.13215e+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.