Matrix properties
number of rows	100
number of columns	100
nonzeros	594
structural full rank?	yes
structural rank	100
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	H. Simon
editor	I. Duff, R. Grimes, J. Lewis
date	1982
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	632
Cholesky flop count	4.4e+03
nnz(L+U), no partial pivoting, with AMD	1,164
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	767
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,414

SVD-based statistics:
norm(A)	0.849138
min(svd(A))	0.000537953
cond(A)	1578.46
rank(A)	100
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.