Matrix properties
number of rows	43,520
number of columns	43,520
nonzeros	3,121,200
structural full rank?	yes
structural rank	43,520
# 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	A. Andrianov
editor	T. Davis
date	2006
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS	DMPERM+
nnz(chol(P*(A+A'+s*I)*P'))	58,450,161	32,126,320	32,157,878
Cholesky flop count	3.1e+11	9.0e+10	9.0e+10
nnz(L+U), no partial pivoting	116,856,802	64,209,120	64,272,236
nnz(V) for QR, upper bound nnz(L) for LU	305,055,480	-	304,915,715
nnz(R) for QR, upper bound nnz(U) for LU	411,847,215	-	411,838,873

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.