Matrix properties
number of rows	53,570
number of columns	53,570
nonzeros	1,173,694
structural full rank?	yes
structural rank	53,570
# of blocks from dmperm	2
# strongly connected comp.	2
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	E. Rothberg
editor	T. Davis
date	1997
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	4,945,868	4,600,647	4,483,687
Cholesky flop count	1.0e+09	7.9e+08	7.0e+08
nnz(L+U), no partial pivoting	9,838,166	9,147,724	8,913,804
nnz(V) for QR, upper bound nnz(L) for LU	9,586,863	7,009,729	6,804,059
nnz(R) for QR, upper bound nnz(U) for LU	18,314,276	13,243,554	12,883,205

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.