Matrix properties
number of rows	7,500
number of columns	7,500
nonzeros	283,992
structural full rank?	yes
structural rank	7,500
# of blocks from dmperm	527
# strongly connected comp.	1
explicit zero entries	10,994
nonzero pattern symmetry	2%
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	3,661,980
Cholesky flop count	4.5e+09
nnz(L+U), no partial pivoting, with AMD	7,316,460
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	8,502,315
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	13,894,291

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 10994 explicit zero entries.

SVD-based statistics:
norm(A)	5.67655e+07
min(svd(A))	0.0014798
cond(A)	3.83603e+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.