Matrix properties
number of rows	3,002
number of columns	3,002
nonzeros	9,000
structural full rank?	no
structural rank	3,000
# of blocks from dmperm	1,002
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	no
positive definite?	no

author
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	8,001
Cholesky flop count	2.2e+04
nnz(L+U), no partial pivoting, with AMD	13,000
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	7,993
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	14,996

SVD-based statistics:
norm(A)	4.24914
min(svd(A))	3.0721e-17
cond(A)	1.38314e+17
rank(A)	3,000
sprank(A)-rank(A)	0
null space dimension	2
full numerical rank?	no
singular value gap	2.47245e+15

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.