Matrix properties
number of rows	33,401
number of columns	33,401
nonzeros	1,317,655
structural full rank?	yes
structural rank	33,401
# 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	186,085,449
Cholesky flop count	1.6e+12
nnz(L+U), no partial pivoting, with AMD	372,137,497
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	203,578,625
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	326,917,382

SVD-based statistics:
norm(A)	84.3139
min(svd(A))	0.0240821
cond(A)	3501.11
rank(A)	33,401
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.