Matrix properties
number of rows	4,875
number of columns	4,875
nonzeros	105,339
structural full rank?	yes
structural rank	4,875
# of blocks from dmperm	3
# strongly connected comp.	3
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	327,024
Cholesky flop count	3.1e+07
nnz(L+U), no partial pivoting, with AMD	649,173
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	310,386
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	596,277

SVD-based statistics:
norm(A)	5.30569e-12
min(svd(A))	2.32383e-14
cond(A)	228.316
rank(A)	4,875
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.