Matrix properties
number of rows	5,041
number of columns	5,041
nonzeros	171,903
structural full rank?	yes
structural rank	5,041
# 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	5,839,407
Cholesky flop count	1.1e+10
nnz(L+U), no partial pivoting, with AMD	11,673,773
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	7,704,397
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	10,360,619

SVD-based statistics:
norm(A)	36.7866
min(svd(A))	0.0345241
cond(A)	1065.54
rank(A)	5,041
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.