Matrix properties
number of rows	11,532
number of columns	11,532
nonzeros	551,184
structural full rank?	yes
structural rank	11,532
# of blocks from dmperm	653
# strongly connected comp.	1
explicit zero entries	17,342
nonzero pattern symmetry	1%
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 11532-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	8,658,431
Cholesky flop count	1.8e+10
nnz(L+U), no partial pivoting, with AMD	17,305,330
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	20,541,699
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	33,047,978

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 17342 explicit zero entries.

SVD-based statistics:
norm(A)	1.53473e+08
min(svd(A))	0.0020197
cond(A)	7.59879e+10
rank(A)	11,532
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.