Matrix properties
number of rows	16,860
number of columns	16,860
nonzeros	2,418,804
structural full rank?	yes
structural rank	16,860
# 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	P. Chen
editor	T. Davis
date	2002
kind	structural problem
2D/3D problem?	yes

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	9,848,031	7,619,883
Cholesky flop count	1.1e+10	5.6e+09
nnz(L+U), no partial pivoting	19,679,202	15,222,906
nnz(V) for QR, upper bound nnz(L) for LU	16,994,709	13,291,494
nnz(R) for QR, upper bound nnz(U) for LU	43,803,294	31,458,372

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.