Matrix properties
number of rows	361
number of columns	361
nonzeros	2,953
structural full rank?	yes
structural rank	361
# 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	G. Everstine, D. Taylor
editor	I. Duff, R. Grimes, J. Lewis
date	1980
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	4,812
Cholesky flop count	7.6e+04
nnz(L+U), no partial pivoting, with AMD	9,263
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	4,978
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	9,315

SVD-based statistics:
norm(A)	8.80772
min(svd(A))	4.2985e-17
cond(A)	2.04902e+17
rank(A)	358
sprank(A)-rank(A)	3
null space dimension	3
full numerical rank?	no
singular value gap	1.96939e+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.