Matrix properties
number of rows	8,219
number of columns	8,219
nonzeros	242,669
structural full rank?	yes
structural rank	8,219
# 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'))	12,897,079	7,698,341
Cholesky flop count	3.0e+10	1.1e+10
nnz(L+U), no partial pivoting	25,785,939	15,388,463
nnz(V) for QR, upper bound nnz(L) for LU	14,908,336	12,326,981
nnz(R) for QR, upper bound nnz(U) for LU	21,837,776	20,858,858

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.