Matrix properties
number of rows	61,349
number of columns	61,349
nonzeros	3,381,809
structural full rank?	yes
structural rank	61,349
# 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'))	555,434,404	213,637,309
Cholesky flop count	8.0e+12	1.3e+12
nnz(L+U), no partial pivoting	1,110,807,459	427,213,269
nnz(V) for QR, upper bound nnz(L) for LU	593,882,722	380,620,858
nnz(R) for QR, upper bound nnz(U) for LU	975,592,944	671,670,399

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.