Matrix properties
number of rows	2,132
number of columns	2,132
nonzeros	14,872
structural full rank?	yes
structural rank	2,132
# of blocks from dmperm	12
# strongly connected comp.	12
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	E. Meyer
editor	I. Duff, R. Grimes, J. Lewis
date	1983
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	52,117
Cholesky flop count	2.3e+06
nnz(L+U), no partial pivoting, with AMD	102,102
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	87,825
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	160,139

SVD-based statistics:
norm(A)	8.231
min(svd(A))	0.00197537
cond(A)	4166.81
rank(A)	2,132
sprank(A)-rank(A)	0
null space dimension	0
full numerical rank?	yes

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.