Matrix properties
number of rows	67,024
number of columns	67,024
nonzeros	2,216,736
structural full rank?	yes
structural rank	67,024
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
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:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	482,032,544	214,633,547
Cholesky flop count	5.1e+12	1.2e+12
nnz(L+U), no partial pivoting	963,998,064	429,200,070
nnz(V) for QR, upper bound nnz(L) for LU	541,818,994	362,185,332
nnz(R) for QR, upper bound nnz(U) for LU	896,893,472	656,494,669

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.