Matrix properties
number of rows	40,000
number of columns	40,000
nonzeros	199,200
structural full rank?	yes
structural rank	40,000
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	J. More', G. Toraldo
editor	N. Gould, Y. Hu, J. Scott
date	1991
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	1,081,911
Cholesky flop count	1.1e+08
nnz(L+U), no partial pivoting, with AMD	2,123,822
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	1,797,823
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	3,294,336

SVD-based statistics:
norm(A)	18.4273
min(svd(A))	0.100571
cond(A)	183.227
rank(A)	40,000
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.