Matrix properties
number of rows	7,500
number of columns	7,500
nonzeros	28,462
structural full rank?	yes
structural rank	7,500
# of blocks from dmperm	713
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	0%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	M. Hohn
editor	T. Davis
date	2003
kind	materials problem
2D/3D problem?	yes

Additional fields	size and type
b	full 7500-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,821,871
Cholesky flop count	1.5e+09
nnz(L+U), no partial pivoting, with AMD	3,636,242
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	228,914
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	443,492

SVD-based statistics:
norm(A)	1.02811e+08
min(svd(A))	0.00651436
cond(A)	1.57821e+10
rank(A)	7,500
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:	SVD did not converge.

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.