Matrix properties
number of rows	52,329
number of columns	52,329
nonzeros	2,698,463
structural full rank?	yes
structural rank	52,329
# 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	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	R. Grimes
editor	T. Davis
date	1995
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	10,826,976	9,896,761
Cholesky flop count	7.4e+09	4.6e+09
nnz(L+U), no partial pivoting	21,601,623	19,741,193
nnz(V) for QR, upper bound nnz(L) for LU	26,295,650	19,073,485
nnz(R) for QR, upper bound nnz(U) for LU	52,077,870	38,037,244

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.