Matrix properties
number of rows	11,999
number of columns	11,999
nonzeros	95,977
structural full rank?	yes
structural rank	11,999
# 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?	no

author	P. Toint
editor	P. Toint
date	1991
kind	statistical/mathematical problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	53,988
Cholesky flop count	2.5e+05
nnz(L+U), no partial pivoting, with AMD	95,977
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	54,000
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	101,960

SVD-based statistics:
norm(A)	15.5168
min(svd(A))	0.00393169
cond(A)	3946.61
rank(A)	11,999
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.