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
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'))	186,085,449	82,869,325
Cholesky flop count	1.6e+12	3.3e+11
nnz(L+U), no partial pivoting	372,137,497	165,705,249
nnz(V) for QR, upper bound nnz(L) for LU	203,578,625	130,025,887
nnz(R) for QR, upper bound nnz(U) for LU	326,917,382	230,410,437

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.