Matrix properties
number of rows	24,696
number of columns	24,696
nonzeros	583,770
structural full rank?	yes
structural rank	24,696
# 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	5,037,495
Cholesky flop count	2.0e+09
nnz(L+U), no partial pivoting, with AMD	10,050,294
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	6,594,048
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	12,126,954

SVD-based statistics:
norm(A)	9.78826e-13
min(svd(A))	3.70722e-15
cond(A)	264.033
rank(A)	24,696
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.