Matrix properties
number of rows	16,320
number of columns	16,320
nonzeros	945,200
structural full rank?	yes
structural rank	16,320
# 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'))	10,550,331	9,020,424	9,524,482
Cholesky flop count	1.9e+10	1.2e+10	1.4e+10
nnz(L+U), no partial pivoting	21,084,342	18,024,528	19,032,644
nnz(V) for QR, upper bound nnz(L) for LU	30,563,380	36,370,728	34,965,846
nnz(R) for QR, upper bound nnz(U) for LU	56,645,803	56,564,312	60,487,402

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.