Matrix properties
number of rows	2,541
number of columns	2,541
nonzeros	7,361
structural full rank?	yes
structural rank	2,541
# of blocks from dmperm	131
# strongly connected comp.	131
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

author	D. Bates
editor	T. Davis
date	2006
kind	statistical/mathematical problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	4,951
Cholesky flop count	9.8e+03
nnz(L+U), no partial pivoting, with AMD	7,361
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	44,674
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	46,953

SVD-based statistics:
norm(A)	1331.55
min(svd(A))	5.38611
cond(A)	247.219
rank(A)	2,541
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.