Matrix properties
number of rows	36,720
number of columns	36,720
nonzeros	2,577,200
structural full rank?	yes
structural rank	36,720
# 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'))	43,395,127	28,301,910	28,381,527
Cholesky flop count	1.9e+11	8.0e+10	8.0e+10
nnz(L+U), no partial pivoting	86,753,534	56,567,100	56,726,334
nnz(V) for QR, upper bound nnz(L) for LU	202,026,884	-	201,887,119
nnz(R) for QR, upper bound nnz(U) for LU	293,358,896	-	293,350,554

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.