Matrix properties
number of rows	18,010
number of columns	18,010
nonzeros	960,946
structural full rank?	yes
structural rank	18,010
# 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	C. Damhaug
editor	N. Gould, Y. Hu, J. Scott
date	2004
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	3,010,842	2,779,702
Cholesky flop count	1.0e+09	7.0e+08
nnz(L+U), no partial pivoting	6,003,674	5,541,394
nnz(V) for QR, upper bound nnz(L) for LU	8,812,674	4,189,678
nnz(R) for QR, upper bound nnz(U) for LU	17,396,166	7,929,696

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.