Matrix properties
number of rows	936
number of columns	936
nonzeros	6,264
structural full rank?	yes
structural rank	936
# 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. George
editor	I. Duff, R. Grimes, J. Lewis
date	1978
kind	2D/3D problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	14,948
Cholesky flop count	3.4e+05
nnz(L+U), no partial pivoting, with AMD	28,960
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	19,275
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	35,324

SVD-based statistics:
norm(A)	6.9056
min(svd(A))	0.00562507
cond(A)	1227.65
rank(A)	936
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.