Matrix properties
number of rows	19,896
number of columns	19,896
nonzeros	738,598
structural full rank?	yes
structural rank	19,896
# 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'))	78,918,573	41,383,395
Cholesky flop count	4.8e+11	1.3e+11
nnz(L+U), no partial pivoting	157,817,250	82,746,894
nnz(V) for QR, upper bound nnz(L) for LU	90,821,242	58,440,187
nnz(R) for QR, upper bound nnz(U) for LU	137,911,398	102,678,461

Maintained by Tim Davis, last updated 30-Sep-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.