Matrix properties
number of rows	29,920
number of columns	29,920
nonzeros	2,033,200
structural full rank?	yes
structural rank	29,920
# 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'))	30,169,645	23,582,954	21,909,836
Cholesky flop count	1.1e+11	6.6e+10	5.6e+10
nnz(L+U), no partial pivoting	60,309,370	47,135,988	43,789,752
nnz(V) for QR, upper bound nnz(L) for LU	104,531,067	-	104,391,302
nnz(R) for QR, upper bound nnz(U) for LU	193,974,168	-	193,965,826

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.