Matrix properties
number of rows	16,428
number of columns	16,428
nonzeros	948,696
structural full rank?	yes
structural rank	16,428
# of blocks from dmperm	779
# strongly connected comp.	1
explicit zero entries	25,130
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 16428-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	17,308,496
Cholesky flop count	5.0e+10
nnz(L+U), no partial pivoting, with AMD	34,600,564
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	40,755,608
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	66,091,121

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 25130 explicit zero entries.

SVD-based statistics:
norm(A)	4.20767e+08
min(svd(A))	0.00319955
cond(A)	1.31508e+11
rank(A)	16,428
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.