Matrix properties
number of rows	10,800
number of columns	10,800
nonzeros	810,000
structural full rank?	yes
structural rank	10,800
# 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	P. Chen
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,283,724
Cholesky flop count	2.6e+08
nnz(L+U), no partial pivoting, with AMD	2,556,648
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,536,244
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	8,352,504

SVD-based statistics:
norm(A)	105.239
min(svd(A))	0
cond(A)	Inf
rank(A)	1,224
sprank(A)-rank(A)	9,576
null space dimension	9,576
full numerical rank?	no
singular value gap	1.26425e+09

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.