Matrix properties
number of rows	5,743
number of columns	5,743
nonzeros	198,787
structural full rank?	yes
structural rank	5,743
# 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	Y. Zhou, Y. Saad, M. Tiago, J. Chelikowsky
editor	T. Davis
date	2005
kind	theoretical/quantum chemistry problem
2D/3D problem?	no

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	7,526,576
Cholesky flop count	1.5e+10
nnz(L+U), no partial pivoting, with AMD	15,047,409
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	9,293,268
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	13,013,581

SVD-based statistics:
norm(A)	25.6159
min(svd(A))	0.0505128
cond(A)	507.117
rank(A)	5,743
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.