Matrix properties
number of rows	13,965
number of columns	13,965
nonzeros	322,905
structural full rank?	yes
structural rank	13,965
# of blocks from dmperm	3
# strongly connected comp.	3
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	R. Grimes
editor	T. Davis
date	1995
kind	materials problem
2D/3D problem?	yes

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	2,285,538
Cholesky flop count	7.2e+08
nnz(L+U), no partial pivoting, with AMD	4,557,111
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	3,002,877
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	5,438,616

SVD-based statistics:
norm(A)	1.76141e-12
min(svd(A))	7.03231e-15
cond(A)	250.474
rank(A)	13,965
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:	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.