Matrix properties
number of rows	31,802
number of columns	31,802
nonzeros	2,164,210
structural full rank?	yes
structural rank	31,802
# 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	A. Gupta
editor	T. Davis
date	1996
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	2,298,971	2,046,962
Cholesky flop count	2.9e+08	3.0e+08
nnz(L+U), no partial pivoting	4,566,140	4,062,122
nnz(V) for QR, upper bound nnz(L) for LU	163,090,890	-
nnz(R) for QR, upper bound nnz(U) for LU	332,044,906	-

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.